| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.96 | 5.86 | 3.74 |
| 2023 | 7.99 | 11.27 | 5.77 |
| 2022 | 11.2 | 17.23 | 8.27 |
| 2021 | 13.57 | 17.47 | 10.37 |
| 2020 | 14.6 | 19.29 | 11.99 |
| 2019 | 13.23 | 16.8 | 7.87 |
| 2018 | 12.64 | 18.79 | 7.8 |
| 2017 | 16.21 | 22.51 | 12.1 |
| 2016 | 14.92 | 19.03 | 12.23 |
| 2015 | 22.35 | 42.2 | 11.33 |
| 2014 | 13.44 | 18.32 | 10.7 |
| 2013 | 11.7 | 17.57 | 8.71 |
| 2012 | 9.87 | 13.91 | 6.89 |
| 2011 | 18.14 | 28.09 | 10.75 |