| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 1.6 | 1.85 | 1.31 |
| 2023 | 2.67 | 4.26 | 1.61 |
| 2022 | 7.08 | 11.3 | 3.61 |
| 2021 | 15.49 | 26.68 | 9.8 |
| 2020 | 9.09 | 17.6 | 5.65 |
| 2019 | 4.66 | 8.42 | 3.27 |
| 2018 | 10.73 | 19.92 | 5.88 |
| 2017 | 15.4 | 26.95 | 8.47 |
| 2016 | 10.98 | 14.57 | 7 |
| 2015 | 6.92 | 13.37 | 4.01 |
| 2014 | 5.26 | 7.79 | 3.87 |
| 2013 | 4.12 | 4.97 | 3.43 |
| 2012 | 4.62 | 5.57 | 3.15 |
| 2011 | 5.64 | 6.61 | 4.19 |