| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.93 | 6.4 | 5.07 |
| 2024 | 5.69 | 8.01 | 4.18 |
| 2023 | 7.58 | 8.91 | 6.18 |
| 2022 | 7.89 | 11.63 | 3.7 |
| 2021 | 5.55 | 8.03 | 4.04 |
| 2020 | 4.72 | 7.15 | 3 |
| 2019 | 7.23 | 9.28 | 6.01 |
| 2018 | 5.69 | 6.67 | 4.49 |
| 2017 | 5.65 | 7.39 | 4.53 |
| 2016 | 24.25 | 74.6 | 7.2 |
| 2015 | 52.2 | 112.74 | 30.79 |
| 2014 | 3.47 | 3.79 | 2.79 |
| 2013 | 2.84 | 4.43 | 0.97 |
| 2012 | 1.87 | 2.51 | 1.27 |
| 2011 | 3.25 | 4.34 | 2.03 |