| Alishan | 80.6 | 83.4 | 81.4 | 84.0 | 89.2 | 89.5 | 91.1 | 92.2 | 91.3 | 86.9 | 82.4 | 80.6 | 86.1 | 1991~2020 |
| Anbu | 92.1 | 91.5 | 89.8 | 88.4 | 87.5 | 87.8 | 85.8 | 87.5 | 89.0 | 91.0 | 92.0 | 92.2 | 89.6 | 1991~2020 |
| Chenggong | 74.7 | 76.5 | 77.7 | 79.5 | 81.5 | 82.2 | 79.7 | 79.8 | 78.5 | 74.3 | 75.2 | 73.9 | 77.8 | 1991~2020 |
| Chiayi | 77.9 | 79.3 | 79.3 | 79.8 | 79.9 | 77.5 | 77.2 | 80.1 | 80.1 | 78.9 | 78.7 | 76.8 | 78.8 | 1991~2020 |
| Tamsui | 80.8 | 82.4 | 81.0 | 79.9 | 79.2 | 79.9 | 75.0 | 76.0 | 76.1 | 77.8 | 78.5 | 79.0 | 78.8 | 1991~2020 |
| Dawu | 70.9 | 72.5 | 72.9 | 74.6 | 77.0 | 76.7 | 76.9 | 78.3 | 77.3 | 72.2 | 70.7 | 69.2 | 74.1 | 1991~2020 |
| Dongjidao | 78.0 | 79.4 | 78.7 | 80.0 | 81.8 | 83.9 | 82.1 | 83.3 | 81.0 | 77.2 | 77.3 | 76.7 | 80.0 | 1991~2020 |
| Hengchun | 70.8 | 72.0 | 71.8 | 73.4 | 76.1 | 81.1 | 80.5 | 82.2 | 77.7 | 71.4 | 70.5 | 69.2 | 74.7 | 1991~2020 |
| Hsinchu | 78.5 | 80.3 | 79.8 | 78.5 | 78.1 | 77.1 | 74.3 | 75.9 | 74.5 | 73.8 | 75.5 | 76.3 | 76.9 | 1992~2020 |
| Hualien | 75.6 | 76.9 | 77.4 | 78.9 | 80.2 | 80.4 | 77.1 | 78.0 | 77.8 | 75.2 | 75.7 | 74.0 | 77.3 | 1991~2020 |
| Kaohsiung | 71.6 | 71.8 | 71.9 | 74.2 | 76.6 | 79.0 | 78.0 | 79.9 | 77.5 | 74.2 | 73.1 | 71.6 | 75.0 | 1991~2020 |
| Keelung | 78.5 | 79.5 | 79.0 | 77.4 | 77.4 | 76.9 | 71.9 | 73.6 | 75.3 | 75.6 | 77.1 | 76.6 | 76.6 | 1991~2020 |
| Lanyu | 85.6 | 86.6 | 86.4 | 88.2 | 89.0 | 90.2 | 89.4 | 89.5 | 88.6 | 85.8 | 86.4 | 85.3 | 87.6 | 1991~2020 |
| Penghu | 78.7 | 80.7 | 80.0 | 80.9 | 82.8 | 85.2 | 83.6 | 84.4 | 79.6 | 75.2 | 76.8 | 76.8 | 80.4 | 1991~2020 |
| Pengjiayu | 77.6 | 79.4 | 80.6 | 82.0 | 84.6 | 87.5 | 85.6 | 85.1 | 82.5 | 77.0 | 77.9 | 76.1 | 81.3 | 1991~2020 |
| Su-ao | 79.7 | 80.8 | 79.5 | 80.3 | 81.8 | 80.8 | 76.2 | 77.3 | 78.0 | 79.3 | 82.2 | 80.6 | 79.7 | 1991~2020 |
| Sun Moon Lake | 76.9 | 78.4 | 80.4 | 82.3 | 84.4 | 85.1 | 84.5 | 85.5 | 84.1 | 81.9 | 79.2 | 77.3 | 81.7 | 1991~2020 |
| Taichung | 74.4 | 75.2 | 74.6 | 75.1 | 75.7 | 76.2 | 74.9 | 77.4 | 74.3 | 70.8 | 72.4 | 72.6 | 74.5 | 1991~2020 |
| Tainan | 75.5 | 75.8 | 74.1 | 75.0 | 75.9 | 77.6 | 76.5 | 78.4 | 75.5 | 73.6 | 75.1 | 74.5 | 75.6 | 1991~2020 |
| Taipei | 77.4 | 78.0 | 76.8 | 75.8 | 74.9 | 75.1 | 70.7 | 72.2 | 73.8 | 74.3 | 75.1 | 75.6 | 75.0 | 1991~2020 |
| Taitung | 71.5 | 72.9 | 73.3 | 75.2 | 77.3 | 77.3 | 76.0 | 76.6 | 76.3 | 72.6 | 72.1 | 70.7 | 74.3 | 1991~2020 |
| Wuqi | 78.4 | 79.9 | 77.9 | 77.6 | 78.5 | 78.2 | 76.2 | 77.4 | 75.9 | 73.8 | 76.1 | 76.0 | 77.2 | 1991~2020 |
| Yilan | 80.3 | 81.1 | 79.6 | 80.8 | 82.6 | 81.9 | 77.9 | 79.0 | 79.5 | 80.7 | 83.0 | 81.4 | 80.7 | 1991~2020 |
| Yushan | 62.3 | 70.7 | 76.2 | 80.0 | 81.5 | 80.8 | 77.7 | 81.0 | 77.4 | 66.4 | 65.9 | 63.1 | 73.6 | 1991~2020 |
| Zhuzihu | 88.4 | 88.1 | 86.9 | 85.4 | 84.6 | 85.4 | 82.5 | 83.8 | 84.6 | 87.0 | 88.0 | 88.3 | 86.1 | 1991~2020 |