| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.41 | 4.4 | 2.9 |
| 2023 | 5.68 | 8.59 | 3.69 |
| 2022 | 6.17 | 8.64 | 3.16 |
| 2021 | 8.37 | 12.77 | 5.93 |
| 2020 | 8.64 | 15.1 | 4.68 |
| 2019 | 4.55 | 5.4 | 3.75 |
| 2018 | 7.83 | 11.45 | 3.95 |
| 2017 | 8.6 | 10.56 | 7.39 |
| 2016 | 10.28 | 13.41 | 8.14 |
| 2015 | 16.09 | 23.82 | 10.3 |
| 2014 | 17.37 | 24.69 | 12.26 |
| 2013 | 17.57 | 21.2 | 15.33 |