| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.06 | 16.76 | 11.65 |
| 2024 | 10.96 | 18.28 | 7.45 |
| 2023 | 14.33 | 17.01 | 12.6 |
| 2022 | 13.99 | 20.8 | 10.44 |
| 2021 | 15.02 | 17.17 | 12.38 |
| 2020 | 16.47 | 19.4 | 12.16 |
| 2019 | 15.09 | 22.18 | 10.03 |
| 2018 | 8.27 | 11.97 | 5.67 |
| 2017 | 12.97 | 18.43 | 8.86 |
| 2016 | 20.67 | 27.33 | 14.82 |
| 2015 | 26.1 | 47.15 | 12.99 |
| 2014 | 21.76 | 28.48 | 15.94 |
| 2013 | 16.54 | 33.07 | 5.95 |
| 2012 | 8.2 | 12 | 4.84 |
| 2011 | 9.76 | 14.86 | 6.59 |
| 2010 | 15.05 | 20.75 | 11.82 |
| 2009 | 12 | 17.16 | 7.95 |
| 2008 | 10.36 | 18.6 | 4.64 |