| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.3 | 6.89 | 3.8 |
| 2023 | 7.61 | 13.21 | 5.05 |
| 2022 | 4.85 | 6.4 | 3.62 |
| 2021 | 5.67 | 6.45 | 4.8 |
| 2020 | 5.03 | 8.66 | 2.47 |
| 2019 | 3.01 | 4.42 | 2.39 |
| 2018 | 6 | 11.14 | 2.58 |
| 2017 | 8.88 | 13.75 | 5 |
| 2016 | 30.35 | 108.32 | 5.8 |
| 2015 | 22.72 | 120.9 | 7.13 |
| 2014 | 4.86 | 8.32 | 3.64 |
| 2013 | 5.64 | 7.48 | 3.88 |
| 2012 | 4.06 | 5.88 | 3.11 |
| 2011 | 4.29 | 5.22 | 3.41 |