| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.62 | 4.9 | 3.14 |
| 2023 | 3.77 | 4.81 | 2.97 |
| 2022 | 3.53 | 4.89 | 2.98 |
| 2021 | 4.59 | 5.64 | 3.89 |
| 2020 | 6.84 | 8.83 | 5.02 |
| 2019 | 13.56 | 19 | 7.29 |
| 2018 | 10.47 | 13.17 | 8.28 |
| 2017 | 10.98 | 13.5 | 9.6 |
| 2016 | 8.34 | 12.89 | 5.13 |
| 2015 | 13.2 | 21.5 | 5.36 |
| 2014 | 8.84 | 21.11 | 6.65 |
| 2013 | 10.48 | 14.31 | 8.04 |
| 2012 | 9.57 | 12.83 | 5.6 |
| 2011 | 7.84 | 9.95 | 5.86 |