| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.98 | 4.79 | 3.28 |
| 2023 | 5.18 | 7.64 | 2.75 |
| 2022 | 8.85 | 14.27 | 5.82 |
| 2021 | 28.8 | 45.81 | 12.14 |
| 2020 | 28.93 | 48.56 | 15.74 |
| 2019 | 16.05 | 21.64 | 12.47 |
| 2018 | 19.48 | 26.5 | 13.74 |
| 2017 | 13.33 | 17.57 | 8.96 |
| 2016 | 10.1 | 12.33 | 7.19 |
| 2015 | 9.28 | 14.59 | 5.51 |
| 2014 | 8.38 | 9.26 | 6.08 |
| 2013 | 7.65 | 10.52 | 5.78 |
| 2012 | 4.77 | 6.17 | 3.82 |
| 2011 | 5.63 | 6.88 | 4.44 |