| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 9.08 | 11.96 | 6.05 |
| 2023 | 13.37 | 21.96 | 9.06 |
| 2022 | 15.14 | 20.97 | 9.16 |
| 2021 | 18.04 | 25.79 | 12.54 |
| 2020 | 16.54 | 23.33 | 11.65 |
| 2019 | 12.68 | 16.97 | 10.37 |
| 2018 | 18.36 | 27.75 | 11.36 |
| 2017 | 20.53 | 28.63 | 15.92 |
| 2016 | 23.19 | 29.77 | 18.37 |
| 2015 | 27.16 | 41.34 | 17.23 |
| 2014 | 23.38 | 34.44 | 17.3 |
| 2013 | 22.61 | 31.06 | 17.39 |
| 2012 | 17.56 | 20.4 | 13.31 |
| 2011 | 23.56 | 31.38 | 18.77 |