| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.45 | 3.39 | 1.79 |
| 2023 | 2.36 | 3.12 | 1.88 |
| 2022 | 2.17 | 3.37 | 1.63 |
| 2021 | 4.23 | 6.71 | 2.97 |
| 2020 | 8.6 | 11.43 | 5.88 |
| 2019 | 6.29 | 9.05 | 4.35 |
| 2018 | 8.8 | 15.22 | 4.89 |
| 2017 | 14.4 | 17.99 | 11.97 |
| 2016 | 13.74 | 16.82 | 11.43 |
| 2015 | 13.78 | 24.26 | 7.21 |
| 2014 | 7.97 | 11.69 | 5.61 |
| 2013 | 11.59 | 15.69 | 6.87 |
| 2012 | 13.45 | 18.33 | 9.98 |
| 2011 | 20.66 | 26.66 | 14.47 |