| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.78 | 3.31 | 2.37 |
| 2024 | 1.88 | 4.36 | 1.21 |
| 2023 | 1.99 | 2.93 | 1.48 |
| 2022 | 3.14 | 4.18 | 2.4 |
| 2021 | 3.31 | 5.95 | 1.48 |
| 2020 | 3.81 | 10.48 | 1.49 |
| 2019 | 7.01 | 8.75 | 5.46 |
| 2018 | 8.01 | 12.37 | 5.05 |
| 2017 | 9.17 | 11.7 | 6.41 |
| 2016 | 12 | 17.35 | 8.16 |
| 2015 | 17.83 | 39.97 | 8.68 |
| 2014 | 10.3 | 15.83 | 7.77 |
| 2013 | 5.2 | 10.44 | 2.99 |
| 2012 | 4.55 | 6.09 | 2.88 |
| 2011 | 7.08 | 9.51 | 3.67 |
| 2010 | 10.27 | 14.16 | 8.08 |
| 2009 | 12.3 | 16.01 | 5.18 |