| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.3 | 21.64 | 14.71 |
| 2024 | 10.86 | 24.47 | 7.3 |
| 2023 | 7.09 | 9.75 | 5.03 |
| 2022 | 4.86 | 7.76 | 1.93 |
| 2021 | 2.54 | 3.23 | 1.85 |
| 2020 | 2.66 | 4.24 | 2.08 |
| 2019 | 2.28 | 2.99 | 1.3 |
| 2018 | 1.73 | 2.31 | 1.29 |
| 2017 | 3.19 | 5.18 | 1.74 |
| 2016 | 5.52 | 9.22 | 3.79 |
| 2015 | 11.39 | 16.55 | 6.89 |
| 2014 | 6.16 | 8.4 | 4.35 |
| 2013 | 4.28 | 8.39 | 2.29 |
| 2012 | 2.71 | 3.67 | 1.78 |
| 2011 | 4.37 | 5.86 | 3.02 |
| 2010 | 10.15 | 28.22 | 4.84 |