| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 36.34 | 41.03 | 31.47 |
| 2024 | 29.46 | 49.3 | 17.26 |
| 2023 | 34.6 | 43.7 | 27.6 |
| 2022 | 38.43 | 50.92 | 28.16 |
| 2021 | 40.4 | 77.35 | 21.86 |
| 2020 | 26.78 | 53.27 | 17.81 |
| 2019 | 22.61 | 34.81 | 5.17 |
| 2018 | 5.06 | 6.92 | 3.77 |
| 2017 | 3.87 | 5.94 | 3.11 |
| 2016 | 4.46 | 6.06 | 2.97 |
| 2015 | 4.22 | 6.06 | 2.42 |
| 2014 | 2.27 | 2.83 | 1.59 |
| 2013 | 1.98 | 2.36 | 1.66 |
| 2012 | 2.26 | 3.08 | 1.49 |
| 2011 | 4.49 | 7.04 | 2.63 |
| 2010 | 7.46 | 10.11 | 5.57 |
| 2009 | 5.8 | 10.75 | 4.13 |