| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 18.65 | 27.53 | 13.58 |
| 2023 | 15.49 | 26.38 | 8.05 |
| 2022 | 5.79 | 9.16 | 3.93 |
| 2021 | 6.44 | 8.44 | 5.13 |
| 2020 | 6.84 | 8.69 | 5.23 |
| 2019 | 4.46 | 6.08 | 2.67 |
| 2018 | 3.81 | 5.1 | 2.7 |
| 2017 | 4.71 | 6.53 | 3.42 |
| 2016 | 6.65 | 8.23 | 5.11 |
| 2015 | 10.02 | 16.69 | 4.4 |
| 2014 | 11.96 | 21.45 | 7.44 |
| 2013 | 11.87 | 15.96 | 8.41 |
| 2012 | 6.93 | 9.37 | 4.91 |