Table A3.
Summary of regressions for calculating extra cost, 2019.
| (A) Slight, moderate, and severe disability | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Variables | Aggregated | Sight | Hearing | ||||||||
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | ||
| Ln real per capita expenditure | 14.7605*** | 11.1987*** | 10.9841*** | 12.6584*** | 16.1719*** | 15.3774*** | 11.1795*** | 10.9750*** | 12.6230*** | 16.1002*** | 15.3906*** |
| Disability status | −0.5609*** | −0.3294* | −0.4749** | −0.7599*** | −1.1968*** | −1.9144*** | −0.5240** | −0.6205** | −1.1365*** | −1.5203*** | −2.2036*** |
| Urban/rural | 4.5532*** | 3.6902*** | 4.4927*** | 5.2404*** | 5.0302*** | 6.0801*** | 3.6888*** | 4.4967*** | 5.2461*** | 5.0476*** | 6.1061*** |
| Province dummy (33 dummies) | Included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | −0.4211*** | 0.0381 | 0.3321 | 0.213 | −0.3086 | −0.0982 | 0.0405 | 0.3322 | 0.2313 | −0.2838 | −0.056 |
| HH size | 2.8297*** | 1.7386*** | 2.2486*** | 2.7731*** | 3.5800*** | 4.8497*** | 1.7388*** | 2.2516*** | 2.7749*** | 3.5809*** | 4.8499*** |
| Age of HH head | 0.6829*** | 0.3370*** | 0.4695*** | 0.5505*** | 0.6618*** | 0.8562*** | 0.3312*** | 0.4614*** | 0.5383*** | 0.6454*** | 0.8330*** |
| Square age of HH head | −0.0044*** | −0.0021*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0053*** | −0.0020*** | −0.0031*** | −0.0038*** | −0.0043*** | −0.0051*** |
| Years of schooling of HH head | 1.2855*** | 0.7887*** | 0.9122*** | 1.1350*** | 1.3889*** | 1.6847*** | 0.7883*** | 0.9117*** | 1.1343*** | 1.3902*** | 1.6892*** |
| Young dependency ratio of HH head | 3.5768*** | −2.7478*** | −0.2028 | 1.2129** | 2.7621*** | 3.5724*** | −2.7689*** | −0.1959 | 1.2389** | 2.8144*** | 3.6770*** |
| Old dependency ratio of HH head | −2.4216*** | −5.3385*** | −5.1273*** | −3.8060*** | −4.3065*** | −4.2139*** | −5.2953*** | −5.1070*** | −3.7478*** | −4.3152*** | −4.2990*** |
| Working HH member ratio | −3.4255*** | −1.0103*** | −1.0381*** | −2.1633*** | −2.4369*** | −3.6908*** | −1.0379*** | −1.0435*** | −2.1505*** | −2.4366*** | −3.6482*** |
| Constant | −215.6211*** | −147.0933*** | −152.3792*** | −181.1987*** | −238.6156*** | −240.2229*** | −146.6984*** | −152.0889*** | −180.4810*** | −237.3325*** | −240.1504*** |
| R-squared | 0.5868 | 0.2974 | 0.3152 | 0.3699 | 0.4331 | 0.5591 | 0.2975 | 0.3152 | 0.3699 | 0.4329 | 0.5586 |
| Observations | 1204466 | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 3.8% | 2.9% | 4.3% | 6.0% | 7.4% | 12.4% | 4.7% | 5.7% | 9.0% | 9.4% | 14.3% |
| Variables | Mobility | Remembering/concentrating | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.1961*** | 10.9656*** | 12.6491*** | 16.1556*** | 15.4053*** | 11.1865*** | 10.9705*** | 12.6508*** | 16.1409*** | 15.3868*** |
| Disability status | −0.1873 | −0.3421 | −0.0829 | −1.3716*** | −1.8242*** | −0.3355 | −1.2673*** | −1.4814*** | −1.5551*** | −2.7654*** |
| Urban/rural | 3.6923*** | 4.5006*** | 5.2621*** | 5.0600*** | 6.1135*** | 3.6926*** | 4.4913*** | 5.2431*** | 5.0513*** | 6.1079*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.045 | 0.3375 | 0.2373 | −0.3172 | −0.112 | 0.0382 | 0.2983 | 0.2041 | −0.308 | −0.1023 |
| HH size | 1.7331*** | 2.2452*** | 2.7619*** | 3.5810*** | 4.8530*** | 1.7349*** | 2.2643*** | 2.7810*** | 3.5815*** | 4.8580*** |
| Age of HH head | 0.3355*** | 0.4665*** | 0.5494*** | 0.6511*** | 0.8386*** | 0.3347*** | 0.4583*** | 0.5372*** | 0.6516*** | 0.8343*** |
| Square age of HH head | −0.0021*** | −0.0032*** | −0.0039*** | −0.0044*** | −0.0051*** | −0.0021*** | −0.0031*** | −0.0038*** | −0.0044*** | −0.0051*** |
| Years of schooling of HH Head | 0.7893*** | 0.9129*** | 1.1373*** | 1.3905*** | 1.6889*** | 0.7889*** | 0.9108*** | 1.1343*** | 1.3898*** | 1.6876*** |
| Young dependency ratio of HH head | −2.7214*** | −0.1764 | 1.3337** | 2.7532*** | 3.5932*** | −2.7449*** | −0.3458 | 1.1577* | 2.7764*** | 3.6253*** |
| Old dependency ratio of HH head | −5.3828*** | −5.1531*** | −3.9165*** | −4.2850*** | −4.2278*** | −5.3633*** | −5.0127*** | −3.7171*** | −4.3182*** | −4.2729*** |
| Working HH member ratio | −1.0097*** | −1.0414*** | −2.1020*** | −2.5231*** | −3.7256*** | −1.0261*** | −1.1391*** | −2.2305*** | −2.4804*** | −3.7234*** |
| Constant | −147.0355*** | −152.0821*** | −181.1305*** | −238.1617*** | −240.3914*** | −146.8691*** | −151.8508*** | −180.7509*** | −237.9637*** | −240.0241*** |
| R-squared | 0.2973 | 0.315 | 0.3695 | 0.4329 | 0.5587 | 0.2973 | 0.3158 | 0.3703 | 0.433 | 0.559 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 8.5% | 11.8% | 11.6% | 11.7% | 9.6% | 18.0% | ||||
| Variables | Communicating | Self-care | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.1878*** | 10.9702*** | 12.6235*** | 16.1319*** | 15.3988*** | 11.2083*** | 10.9529*** | 12.6374*** | 16.1635*** | 15.4081*** |
| Disability status | −0.238 | −1.4517*** | −1.1697*** | −2.1655*** | −3.4049*** | 0.0955 | −1.2534*** | −0.5352 | −1.2347** | −3.0471*** |
| Urban/rural | 3.6941*** | 4.5005*** | 5.2585*** | 5.0616*** | 6.1244*** | 3.6945*** | 4.4969*** | 5.2616*** | 5.0593*** | 6.1106*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.0485 | 0.3263 | 0.2311 | −0.2909 | −0.0526 | 0.0555 | 0.3452 | 0.236 | −0.275 | −0.0661 |
| HH size | 1.7312*** | 2.2557*** | 2.7674*** | 3.5769*** | 4.8511*** | 1.7285*** | 2.2517*** | 2.7646*** | 3.5733*** | 4.8515*** |
| Age of HH head | 0.3357*** | 0.4613*** | 0.5443*** | 0.6523*** | 0.8397*** | 0.3369*** | 0.4630*** | 0.5483*** | 0.6583*** | 0.8387*** |
| Square age of HH head | −0.0021*** | −0.0031*** | −0.0038*** | −0.0044*** | −0.0052*** | −0.0021*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0052*** |
| Years of schooling of HH Head | 0.7892*** | 0.9114*** | 1.1359*** | 1.3914*** | 1.6904*** | 0.7896*** | 0.9138*** | 1.1372*** | 1.3931*** | 1.6922*** |
| Young dependency ratio of HH head | −2.7091*** | −0.3041 | 1.2501** | 2.7926*** | 3.6354*** | −2.6486*** | −0.2555 | 1.3044** | 2.8613*** | 3.6449*** |
| Old dependency ratio of HH head | −5.4153*** | −5.1214*** | −3.8695*** | −4.4219*** | −4.3800*** | −5.4500*** | −5.1531*** | −3.9030*** | −4.4331*** | −4.3990*** |
| Working HH member ratio | −0.9984*** | −1.1109*** | −2.1694*** | −2.4817*** | −3.6927*** | −0.9499*** | −1.1219*** | −2.1378*** | −2.4411*** | −3.7259*** |
| Constant | −146.9352*** | −151.9531*** | −180.6008*** | −237.8894*** | −240.3879*** | −147.2779*** | −151.7949*** | −180.9240*** | −238.5118*** | −240.4958*** |
| R-squared | 0.2973 | 0.3156 | 0.3698 | 0.433 | 0.5588 | 0.2973 | 0.3154 | 0.3696 | 0.4326 | 0.5587 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 13.2% | 9.3% | 13.4% | 22.1% | 11.4% | 7.6% | 19.8% | |||
| Variables | Multi disability | ||||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.1741*** | 10.9750*** | 12.6268*** | 16.1224*** | 15.3844*** |
| Disability status | −0.5020** | −1.2114*** | −1.0002*** | −1.6773*** | −2.8647*** |
| Urban/rural | 3.6908*** | 4.4815*** | 5.2412*** | 5.0462*** | 6.0843*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.0234 | 0.2867 | 0.2045 | −0.3311 | −0.1361 |
| HH size | 1.7412*** | 2.2659*** | 2.7759*** | 3.5894*** | 4.8665*** |
| Age of HH head | 0.3333*** | 0.4579*** | 0.5407*** | 0.6449*** | 0.8277*** |
| Square age of HH head | −0.0021*** | −0.0031*** | −0.0038*** | −0.0043*** | −0.0050*** |
| Years of schooling of HH head | 0.7881*** | 0.9107*** | 1.1343*** | 1.3883*** | 1.6835*** |
| Young dependency ratio of HH head | −2.8209*** | −0.4248 | 1.1617* | 2.6744*** | 3.5339*** |
| Old dependency ratio of HH head | −5.2647*** | −4.9017*** | −3.7101*** | −4.2259*** | −4.1256*** |
| Working HH member ratio | −1.0772*** | −1.1955*** | −2.2328*** | −2.5481*** | −3.7915*** |
| Constant | −146.6283*** | −151.8512*** | −180.4995*** | −237.5166*** | −239.7671*** |
| R-squared | 0.2975 | 0.316 | 0.37 | 0.4333 | 0.5594 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 4.5% | 11.0% | 7.9% | 10.4% | 18.6% |
| (B) Moderate and severe disability. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Variables | Aggregated | Sight | Hearing | ||||||||
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | ||
| Ln real per capita expenditure | 14.7605*** | 11.1922*** | 10.9750*** | 12.6510*** | 16.1785*** | 15.3925*** | 11.1787*** | 10.9706*** | 12.6375*** | 16.1672*** | 15.4036*** |
| Disability status | −0.5609*** | −0.5457* | −0.9992** | −1.5164*** | −2.6290*** | −3.4500*** | −0.9314*** | −1.0307** | −1.3923** | −1.5031** | −3.3810*** |
| Urban/rural | 4.5532*** | 3.6937*** | 4.4943*** | 5.2551*** | 5.0485*** | 6.1238*** | 3.6915*** | 4.4976*** | 5.2606*** | 5.0577*** | 6.1291*** |
| Province dummy (33 dummies) | Included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | −0.4211*** | 0.0448 | 0.3434 | 0.2305 | −0.2848 | −0.0648 | 0.0489 | 0.3441 | 0.2385 | −0.2729 | −0.0571 |
| HH size | 2.8297*** | 1.7334*** | 2.2443*** | 2.7664*** | 3.5722*** | 4.8441*** | 1.7353*** | 2.2459*** | 2.7648*** | 3.5686*** | 4.8375*** |
| Age of HH head | 0.6829*** | 0.3352*** | 0.4666*** | 0.5467*** | 0.6540*** | 0.8494*** | 0.3319*** | 0.4644*** | 0.5453*** | 0.6560*** | 0.8463*** |
| Square age of HH head | −0.0044*** | −0.0021*** | −0.0032*** | −0.0039*** | −0.0044*** | −0.0053*** | −0.0020*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0053*** |
| Years of schooling of HH head | 1.2855*** | 0.7888*** | 0.9126*** | 1.1357*** | 1.3904*** | 1.6905*** | 0.7885*** | 0.9129*** | 1.1361*** | 1.3926*** | 1.6923*** |
| Young dependency ratio of HH head | 3.5768*** | −2.7258*** | −0.1709 | 1.2603** | 2.8643*** | 3.6774*** | −2.7456*** | −0.1597 | 1.3012** | 2.9050*** | 3.7075*** |
| Old dependency ratio of HH head | −2.4216*** | −5.3880*** | −5.1805*** | −3.8640*** | −4.4159*** | −4.3796*** | −5.3603*** | −5.1914*** | −3.8877*** | −4.4688*** | −4.4261*** |
| Working HH member ratio | −3.4255*** | −1.0101*** | −1.0431*** | −2.1716*** | −2.4368*** | −3.6219*** | −1.0247*** | −1.0177*** | −2.1317*** | −2.3858*** | −3.6264*** |
| Constant | −215.6211*** | −146.9713*** | −152.2058*** | −181.0338*** | −238.6001*** | −240.4981*** | −146.7187*** | −152.1236*** | −180.8567*** | −238.5453*** | −240.6258*** |
| R-squared | 0.5868 | 0.2974 | 0.3152 | 0.3698 | 0.433 | 0.5586 | 0.2975 | 0.3151 | 0.3697 | 0.4325 | 0.5584 |
| Observations | 1204466 | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 3.8% | 4.9% | 9.1% | 12.0% | 16.2% | 22.4% | 8.3% | 9.4% | 11.0% | 9.3% | 21.9% |
| Variables | Mobility | Remembering/concentrating | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.2023*** | 10.9644*** | 12.6556*** | 16.1741*** | 15.4052*** | 11.2001*** | 10.9629*** | 12.6131*** | 16.1380*** | 15.4005*** |
| Disability status | −0.0664 | −0.6676* | 0.3981 | −1.4191*** | −3.0253*** | −0.1227 | −1.0641** | −2.2204*** | −2.1848*** | −2.8689*** |
| Urban/rural | 3.6943*** | 4.4993*** | 5.2636*** | 5.0585*** | 6.1187*** | 3.6943*** | 4.5009*** | 5.2628*** | 5.0585*** | 6.1246*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.0533 | 0.3477 | 0.2433 | −0.287 | −0.0721 | 0.0513 | 0.3363 | 0.2248 | −0.2836 | −0.0671 |
| HH size | 1.7300*** | 2.2437*** | 2.7576*** | 3.5744*** | 4.8439*** | 1.7304*** | 2.2466*** | 2.7735*** | 3.5754*** | 4.8420*** |
| Age of HH head | 0.3365*** | 0.4669*** | 0.5513*** | 0.6570*** | 0.8408*** | 0.3365*** | 0.4663*** | 0.5441*** | 0.6554*** | 0.8476*** |
| Square age of HH head | −0.0021*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0052*** | −0.0021*** | −0.0032*** | −0.0038*** | −0.0045*** | −0.0053*** |
| Years of schooling of HH head | 0.7896*** | 0.9136*** | 1.1374*** | 1.3928*** | 1.6910*** | 0.7895*** | 0.9133*** | 1.1356*** | 1.3922*** | 1.6921*** |
| Young dependency ratio of HH head | −2.6770*** | −0.1697 | 1.3867** | 2.8361*** | 3.6348*** | −2.6835*** | −0.1908 | 1.1928** | 2.8264*** | 3.6964*** |
| Old dependency ratio of HH head | −5.4332*** | −5.1925*** | −3.9625*** | −4.4266*** | −4.3889*** | −5.4322*** | −5.1988*** | −3.8702*** | −4.4504*** | −4.4313*** |
| Working HH member ratio | −0.9756*** | −1.0464*** | −2.0573*** | −2.4476*** | −3.7149*** | −0.9798*** | −1.0518*** | −2.2021*** | −2.4422*** | −3.6417*** |
| Constant | −147.1703*** | −152.0841*** | −181.2935*** | −238.6203*** | −240.4711*** | −147.1347*** | −152.0357*** | −180.4287*** | −238.0713*** | −240.5891*** |
| R-squared | 0.2973 | 0.3151 | 0.3695 | 0.4326 | 0.5587 | 0.2973 | 0.3152 | 0.3701 | 0.4327 | 0.5584 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 6.1% | 8.8% | 19.6% | 9.7% | 17.6% | 13.5% | 18.6% | |||
| Variables | Communicating | Self-care | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.1992*** | 10.9831*** | 12.6340*** | 16.1445*** | 15.4033*** | 11.2157*** | 10.9724*** | 12.6540*** | 16.1669*** | 15.4017*** |
| Disability status | −0.1322 | −2.1337*** | −1.4827** | −2.6441*** | −2.5969* | 0.4135 | −0.5487 | 0.3286 | −0.8209 | −2.8400*** |
| Urban/rural | 3.6943*** | 4.5062*** | 5.2627*** | 5.0643*** | 6.1294*** | 3.6952*** | 4.5008*** | 5.2625*** | 5.0585*** | 6.1218*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.0523 | 0.3389 | 0.2383 | −0.281 | −0.0577 | 0.0568 | 0.3507 | 0.2413 | −0.2736 | −0.0575 |
| HH size | 1.7300*** | 2.2501*** | 2.7638*** | 3.5742*** | 4.8397*** | 1.7274*** | 2.2420*** | 2.7591*** | 3.5691*** | 4.8412*** |
| Age of HH head | 0.3366*** | 0.4642*** | 0.5478*** | 0.6598*** | 0.8527*** | 0.3366*** | 0.4677*** | 0.5503*** | 0.6618*** | 0.8488*** |
| Square age of HH head | −0.0021*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0054*** | −0.0021*** | −0.0032*** | −0.0039*** | −0.0045*** | −0.0053*** |
| Years of schooling of HH Head | 0.7895*** | 0.9116*** | 1.1367*** | 1.3925*** | 1.6933*** | 0.7896*** | 0.9136*** | 1.1374*** | 1.3939*** | 1.6934*** |
| Young dependency ratio of HH head | −2.6793*** | −0.237 | 1.3043** | 2.8554*** | 3.6944*** | −2.6272*** | −0.1344 | 1.3646** | 2.9037*** | 3.6720*** |
| Old dependency ratio of HH head | −5.4378*** | −5.2442*** | −3.9385*** | −4.4692*** | −4.4351*** | −5.4624*** | −5.2318*** | −3.9437*** | −4.4707*** | −4.4316*** |
| Working HH member ratio | −0.9745*** | −1.0699*** | −2.1362*** | −2.4218*** | −3.6272*** | −0.9328*** | −1.0103*** | −2.0768*** | −2.3790*** | −3.6590*** |
| Constant | −147.1298*** | −152.2395*** | −180.8666*** | −238.2814*** | −240.7521*** | −147.3800*** | −152.2358*** | −181.2355*** | −238.6753*** | −240.6363*** |
| R-squared | 0.2973 | 0.3156 | 0.3697 | 0.4328 | 0.5583 | 0.2973 | 0.315 | 0.3695 | 0.4324 | 0.5584 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 19.4% | 11.7% | 16.4% | 16.9% | 18.4% | |||||
| Variables | Multi disability | ||||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | |
| Ln real per capita expenditure | 11.1916*** | 10.9676*** | 12.6354*** | 16.1718*** | 15.3965*** |
| Disability status | −0.2926 | −1.4039*** | −0.8144* | −2.0664*** | −3.4741*** |
| Urban/rural | 3.6941*** | 4.4928*** | 5.2602*** | 5.0581*** | 6.1134*** |
| Province dummy (33 dummies) | Not included | Not included | Not included | Not included | Not included |
| Male HH head | 0.0483 | 0.3382 | 0.2349 | −0.2853 | −0.0605 |
| HH size | 1.7321*** | 2.2504*** | 2.7662*** | 3.5776*** | 4.8469*** |
| Age of HH head | 0.3355*** | 0.4625*** | 0.5473*** | 0.6521*** | 0.8401*** |
| Square age of HH head | −0.0021*** | −0.0031*** | −0.0039*** | −0.0044*** | −0.0052*** |
| Years of schooling of HH head | 0.7892*** | 0.9122*** | 1.1368*** | 1.3918*** | 1.6907*** |
| Young dependency ratio of HH head | −2.7177*** | −0.265 | 1.2735** | 2.8082*** | 3.6486*** |
| Old dependency ratio of HH head | −5.4132*** | −5.1685*** | −3.8951*** | −4.4353*** | −4.4272*** |
| Working HH member ratio | −1.0076*** | −1.1168*** | −2.1568*** | −2.4826*** | −3.6953*** |
| Constant | −146.9791*** | −151.9597*** | −180.8581*** | −238.4624*** | −240.3505*** |
| R-squared | 0.2973 | 0.3154 | 0.3696 | 0.4328 | 0.5587 |
| Observations | 327303 | 259585 | 240162 | 206905 | 155699 |
| Extra cost | 12.8% | 6.4% | 12.8% | 22.6% | |