| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 53.78 | 89.15 | 43.42 |
| 2024 | 43.37 | 72.88 | 32.27 |
| 2023 | 41.13 | 58.97 | 26.69 |
| 2022 | 29.8 | 63.86 | 19.67 |
| 2021 | 33.35 | 52.04 | 16.74 |
| 2020 | 17.05 | 23.08 | 13.87 |
| 2019 | 12.97 | 21.32 | 4.64 |
| 2018 | 5.76 | 7.89 | 3.91 |
| 2017 | 6.8 | 8.82 | 5.34 |
| 2016 | 6.06 | 7.48 | 4.55 |
| 2015 | 9.16 | 16.27 | 5.14 |
| 2014 | 5.65 | 6.97 | 4.25 |
| 2013 | 4.46 | 7.66 | 3.23 |
| 2012 | 4.82 | 6.49 | 2.92 |
| 2011 | 8.36 | 12.25 | 5.23 |
| 2010 | 8.84 | 11.34 | 6.83 |
| 2009 | 7.26 | 10.67 | 4.14 |
| 2008 | 7.65 | 18.91 | 2.68 |