Table 6.
Statistics on the emotional health risk level of hostility caused by high temperature within the Sixth Ring Road of Beijing.
| Level | Year | |||||||
|---|---|---|---|---|---|---|---|---|
| 1991 | 1999 | 2011 | 2020 | |||||
| Area/km2 | Proportion/% | Area/km2 | Proportion/% | Area/km2 | Proportion/% | Area/km2 | Proportion/% | |
| 1 | 94.84 | 4.18 | 5.80 | 0.26 | 0.68 | 0.03 | 0.65 | 0.03 |
| 2 | 1,714.59 | 75.58 | 1,063.52 | 46.88 | 152.74 | 6.73 | 28.26 | 1.25 |
| 3 | 452.45 | 19.94 | 1,146.56 | 50.54 | 1,753.13 | 77.28 | 1,063.56 | 46.88 |
| 4 | 6.62 | 0.29 | 51.57 | 2.27 | 356.71 | 15.72 | 1,150.16 | 50.70 |
| 5 | 0.09 | 0.00 | 1.13 | 0.05 | 5.24 | 0.23 | 25.44 | 1.12 |
| 6 | 0.00 | 0.00 | 0.02 | 0.00 | 0.09 | 0.00 | 0.53 | 0.02 |