| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.89 | 12.94 | 7.54 |
| 2024 | 7.48 | 12.71 | 4.38 |
| 2023 | 9.97 | 13.82 | 7.07 |
| 2022 | 3.77 | 7.58 | 2.66 |
| 2021 | 4.26 | 5.88 | 2.67 |
| 2020 | 2.18 | 3.42 | 1.24 |
| 2019 | 1.47 | 2.13 | 0.91 |
| 2018 | 2.23 | 4.31 | 0.73 |
| 2017 | 5.66 | 7.63 | 4.14 |
| 2016 | 4.51 | 9.11 | 3.02 |
| 2015 | 4.81 | 8.42 | 3.12 |
| 2014 | 3.03 | 5.05 | 2.13 |
| 2013 | 2.35 | 2.71 | 1.75 |
| 2012 | 2.61 | 3.18 | 2.19 |
| 2011 | 4.07 | 6.34 | 2.16 |
| 2010 | 4.41 | 5.82 | 3.14 |
| 2009 | 5.63 | 7 | 4.68 |
| 2008 | 9.07 | 17.12 | 3.82 |
| 2007 | 11.64 | 18.55 | 2.94 |