| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.97 | 21.38 | 8.94 |
| 2024 | 15.5 | 28.9 | 9.79 |
| 2023 | 18.26 | 23.25 | 14 |
| 2022 | 15.25 | 18.51 | 12.66 |
| 2021 | 11.91 | 32.76 | 1.95 |
| 2020 | 5.78 | 12.26 | 2.51 |
| 2019 | 8.95 | 11.92 | 6.94 |
| 2018 | 9.68 | 12.42 | 7.11 |
| 2017 | 15.45 | 26.88 | 10.15 |
| 2016 | 17.7 | 29.43 | 9.9 |
| 2015 | 16.7 | 27.66 | 11.29 |
| 2014 | 20.35 | 32.24 | 11.09 |
| 2013 | 22.74 | 57.09 | 7.34 |
| 2012 | 11.17 | 19.06 | 6.23 |
| 2011 | 22.77 | 30.38 | 15.03 |