| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 22.3 | 24.02 | 20.16 |
| 2024 | 20.52 | 29.88 | 16.73 |
| 2023 | 16.34 | 24.29 | 9.97 |
| 2022 | 11.3 | 13.88 | 9.74 |
| 2021 | 19.55 | 26.55 | 13.05 |
| 2020 | 17.5 | 24.91 | 10.25 |
| 2019 | 42.55 | 71.24 | 14.04 |
| 2018 | 22.82 | 32.68 | 17.94 |
| 2017 | 25.3 | 35.55 | 20.82 |
| 2016 | 24.95 | 43.03 | 16.88 |
| 2015 | 43.71 | 88.36 | 15.35 |
| 2014 | 43.11 | 95.13 | 25.02 |
| 2013 | 24.12 | 28.21 | 21.22 |
| 2012 | 21.84 | 27.27 | 15.66 |
| 2011 | 21.13 | 27.64 | 15.4 |
| 2010 | 32.19 | 49.47 | 23.11 |
| 2009 | 61.16 | 88.55 | 40.99 |
| 2008 | 69.45 | 118 | 40.36 |