| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.2 | 3.46 | 2.83 |
| 2024 | 3.24 | 4.47 | 1.87 |
| 2023 | 6.27 | 27.58 | 2.69 |
| 2022 | 2.53 | 3.21 | 1.78 |
| 2021 | 1.64 | 2.59 | 0.84 |
| 2020 | 1.75 | 2.43 | 1.37 |
| 2019 | 2.08 | 2.73 | 1.53 |
| 2018 | 1.81 | 2.71 | 1.32 |
| 2017 | 7.9 | 20.02 | 2.71 |
| 2016 | 15.77 | 21.55 | 12.21 |
| 2015 | 26.34 | 59.04 | 12.08 |
| 2014 | 9.67 | 15.5 | 6.65 |
| 2013 | 7.65 | 14.54 | 5.18 |
| 2012 | 5.2 | 6.44 | 4.21 |
| 2011 | 7.66 | 9.58 | 5.7 |