| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.09 | 10.21 | 7.84 |
| 2024 | 6.31 | 10.36 | 4.02 |
| 2023 | 14.79 | 25.2 | 6.23 |
| 2022 | 13.71 | 25.44 | 4.4 |
| 2021 | 4.97 | 7.87 | 2.68 |
| 2020 | 3 | 4.39 | 1.42 |
| 2019 | 1.86 | 2.55 | 1.16 |
| 2018 | 2 | 2.75 | 1.29 |
| 2017 | 3.46 | 5.58 | 2.63 |
| 2016 | 5.08 | 6.21 | 4.27 |
| 2015 | 6.78 | 14.11 | 3.47 |
| 2014 | 3.2 | 4.32 | 2.29 |
| 2013 | 2.32 | 2.67 | 2.03 |
| 2012 | 2.8 | 3.73 | 1.97 |
| 2011 | 6.68 | 13.87 | 2.83 |
| 2010 | 11.18 | 16.15 | 8.3 |
| 2009 | 8.27 | 11.31 | 5.4 |
| 2008 | 7.26 | 15.1 | 2.3 |
| 2007 | 10.63 | 14.8 | 3 |