| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.23 | 8.64 | 4.31 |
| 2024 | 10.61 | 13.67 | 8.02 |
| 2023 | 13.37 | 22.9 | 9.07 |
| 2022 | 11.79 | 15.64 | 8.57 |
| 2021 | 14.46 | 28.04 | 5.71 |
| 2020 | 6.09 | 8.78 | 2.92 |
| 2019 | 3.48 | 4.36 | 3.05 |
| 2018 | 4.04 | 5.77 | 2.3 |
| 2017 | 6.89 | 11.41 | 5.05 |
| 2016 | 6.35 | 11.92 | 3.92 |
| 2015 | 4.79 | 7.28 | 2.51 |
| 2014 | 3.45 | 4.21 | 2.54 |
| 2013 | 8.37 | 12.6 | 3.01 |
| 2012 | 3.62 | 5.92 | 1.57 |
| 2011 | 2.7 | 3.74 | 1.44 |
| 2010 | 2.86 | 3.63 | 2.22 |
| 2009 | 1.89 | 3.11 | 0.72 |
| 2008 | 1.38 | 2.96 | 0.61 |
| 2007 | 1.82 | 2.94 | 0.74 |
| 2006 | 0.96 | 1.31 | 0.68 |
| 2005 | 1.33 | 1.99 | 0.94 |
| 2004 | 2.46 | 3.72 | 1.47 |