| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.78 | 11.31 | 9.8 |
| 2024 | 9.68 | 13.12 | 7.69 |
| 2023 | 10.86 | 13.13 | 8.28 |
| 2022 | 9.57 | 15.21 | 5.74 |
| 2021 | 22.26 | 35.6 | 10.84 |
| 2020 | 21.26 | 50.01 | 11.72 |
| 2019 | 17.49 | 35.73 | 6.53 |
| 2018 | 6.62 | 7.98 | 5.2 |
| 2017 | 7.2 | 10.89 | 5.7 |
| 2016 | 6.07 | 9.62 | 3.47 |
| 2015 | 5.04 | 8.26 | 3.06 |
| 2014 | 2.52 | 4.35 | 1.34 |
| 2013 | 1.45 | 1.87 | 1.03 |
| 2012 | 1.06 | 1.46 | 0.73 |
| 2011 | 1.87 | 2.26 | 1.11 |
| 2010 | 1.96 | 2.63 | 1.32 |
| 2009 | 1 | 1.68 | 0.51 |
| 2008 | 0.8 | 1.71 | 0.36 |
| 2007 | 1.35 | 2.68 | 0.39 |
| 2006 | 0.39 | 0.52 | 0.31 |
| 2005 | 0.32 | 0.41 | 0.24 |
| 2004 | 0.47 | 0.82 | 0.28 |