| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.58 | 14.98 | 7.22 |
| 2024 | 8.54 | 11.21 | 6.59 |
| 2023 | 26.38 | 69.72 | 9.12 |
| 2022 | 28.12 | 57.96 | 15.82 |
| 2021 | 34.42 | 52.76 | 26.42 |
| 2020 | 5.21 | 14.52 | 0.95 |
| 2019 | 1.11 | 1.43 | 0.88 |
| 2018 | 1.95 | 2.76 | 0.91 |
| 2017 | 3.6 | 5.19 | 2.78 |
| 2016 | 5.39 | 7.88 | 3.69 |
| 2015 | 6.46 | 11.65 | 4.18 |
| 2014 | 4.75 | 5.7 | 3.97 |
| 2013 | 4.09 | 6.37 | 2.67 |
| 2012 | 2.66 | 3.26 | 2.15 |
| 2011 | 3.87 | 6.21 | 2.3 |
| 2010 | 4.21 | 4.94 | 3.33 |
| 2009 | 3.23 | 4.42 | 2.02 |
| 2008 | 3.66 | 7.49 | 1.42 |