| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 1.3 | 1.87 | 0.86 |
| 2023 | 2.36 | 3.88 | 1.56 |
| 2022 | 8.46 | 13.2 | 3.16 |
| 2021 | 17.88 | 40.38 | 8.46 |
| 2020 | 5.27 | 10.21 | 2.26 |
| 2019 | 3.25 | 4.39 | 2.58 |
| 2018 | 6.16 | 10.77 | 3.08 |
| 2017 | 10.13 | 14.78 | 7.42 |
| 2016 | 11.4 | 15.93 | 7.44 |
| 2015 | 6.83 | 15.61 | 3.41 |
| 2014 | 5.24 | 13.53 | 2.89 |
| 2013 | 5.16 | 6.76 | 4.1 |
| 2012 | 4.4 | 5.2 | 3.48 |
| 2011 | 5.47 | 6.47 | 3.93 |