Table 4. Indices of temporal change of epidemic in fiscal 1999-2005.
| Disease | Fiscal year | ||||||
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | |
| Influenza | |||||||
| Height of peak (%)* | 59.5 | 5.5 | 25.7 | 66.7 | 59.5 | 90.1 | 55.4 |
| Week of peak* | 5th, 6th | 11th, 12th | 8th | 5th | 7th | 10th | 5th |
| First week†, ‡ | 3rd | 11th | 5th | 52nd | 4th | 5th | 2nd |
| Last week†, ‡ | 9th | 12th | 13th | 13th | 11th | 13th | 10th |
| Duration (in weeks) † | 7 | 2 | 9 | 14 | 8 | 9 | 9 |
| Pharyngoconjunctival fever | |||||||
| Height of peak (%)* | - | 8.8 | 13.6 | - | 17.4 | 30.7 | 16.0 |
| Week of peak* | - | 34th | 32nd | - | 30th, 32nd | 30th | 33rd |
| First week†, ‡ | - | 28th | 27th | - | 22nd | 17th | 22nd |
| Last week†, ‡ | - | 38th | 38th | - | 41st | 41st | 43rd |
| Duration (in weeks)† | - | 11 | 12 | - | 20 | 25 | 22 |
| Infectious gastroenteritis | |||||||
| Height of peak (%)* | 39.8 | 34.5 | 33.6 | 23.2 | 36.8 | 34.7 | 38.5 |
| Week of peak* | 51st | 51st | 51st | 49th | 52nd | 52nd | 50th, 51st |
| First week†, ‡ | 47th | 48th | 47th | 45th | 47th | 49th | 47th |
| Last week†, ‡ | 2000.17th | 13th | 2002.14th | 2003.14th | 13th | 10th | 12th |
| Duration (in weeks)† | 23 | 18 | 20 | 22 | 19 | 15 | 18 |
| Chickenpox | |||||||
| Height of peak (%)* | 9.5 | 12.1 | 7.2 | 8.8 | 15.5 | 7.3 | 8.6 |
| Week of peak* | 1st | 1st | 2nd | 2nd | 2nd | 1st | 1st |
| First week†, ‡ | 50th | 49th | 51st | 50th | 48th | 52nd | 50th |
| Last week†, ‡ | 2nd | 13th | 2nd | 2nd | 5th | 1st | 2nd |
| Duration (in weeks)† | 5 | 17 | 4 | 5 | 10 | 3 | 5 |
| Hand-foot-mouth disease | |||||||
| Height of peak (%)* | 7.2 | 49.3 | 24.6 | 16.0 | 36.1 | 8.8 | 12.8 |
| Week of peak* | 29th, 30th | 30th | 29th | 30th | 31st | 38th | 28th |
| First week†, ‡ | 26th | 21st | 21st | 25th | 24th | 28th | 26th |
| Last week†, ‡ | 31st | 48th | 33rd | 33rd | 42nd | 49th | 33rd |
| Duration (in weeks)† | 6 | 28 | 13 | 9 | 19 | 22 | 8 |
| Erythema infectiosum | |||||||
| Height of peak (%)* | - | 6.5 | 21.5 | 13.4 | - | 12.4 | 8.8 |
| Week of peak* | - | 26th | 26th | 27th | - | 22nd | 25th |
| First week†, ‡ | - | 22nd | 2001.3rd | 2001.49th | - | 16th | 22nd |
| Last week†, ‡ | - | 28th | 30th | 30th | - | 29th | 29th |
| Duration (in weeks)† | - | 7 | 28 | 34 | - | 14 | 8 |
| Herpangina | |||||||
| Height of peak (%)* | 48.4 | 41.2 | 50.2 | 30.6 | 47.0 | 29.8 | 43.3 |
| Week of peak* | 30th | 30th | 30th | 31st | 31st | 29th | 28th, 29th |
| First week†, ‡ | 23rd | 24th | 25th | 24th | 25th | 24th | 24th |
| Last week†, ‡ | 38th | 38th | 36th | 34th | 39th | 34th | 36th |
| Duration (in weeks)† | 16 | 15 | 12 | 11 | 15 | 11 | 13 |
| Measles | |||||||
| Height of peak (%)* | - | 7.6 | 15.3 | - | - | - | - |
| Week of peak* | - | 20th | 21st | - | - | - | - |
| First week†, ‡ | - | 17th | 2001.6th | - | - | - | - |
| Last week†, ‡ | - | 23rd | 31st | - | - | - | - |
| Duration (in weeks)† | - | 7 | 26 | - | - | - | - |
* : The peak in proportions of public health center areas with epidemic in a given year.
† : First week, last week and duration over the 5% level of the proportion of public health center areas with epidemic.
‡ : Week preceding or following given fiscal year is mentioned if the elevation continued across the fiscal years.