| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 24.97 | 30.58 | 21.41 |
| 2024 | 19.39 | 28.28 | 10.27 |
| 2023 | 12.33 | 16.85 | 9.42 |
| 2022 | 11.51 | 15.98 | 8.48 |
| 2021 | 7.02 | 15.72 | 4.87 |
| 2020 | 9.45 | 12.47 | 7.29 |
| 2019 | 4.75 | 8.93 | 1.87 |
| 2018 | 3.1 | 6.17 | 1.55 |
| 2017 | 15.33 | 23.1 | 5.57 |
| 2016 | 15.5 | 19.1 | 10.29 |
| 2015 | 10.49 | 17.87 | 4.9 |
| 2014 | 3.31 | 5.65 | 2.28 |
| 2013 | 2.92 | 3.84 | 2.3 |
| 2012 | 2.26 | 2.69 | 1.87 |
| 2011 | 2.89 | 3.55 | 2 |
| 2010 | 4.58 | 7.02 | 2.93 |
| 2009 | 6.71 | 7.77 | 5.75 |
| 2008 | 1.68 | 2.16 | 1.33 |
| 2007 | 1.76 | 3.25 | 0.68 |
| 2006 | 0.69 | 0.94 | 0.57 |
| 2005 | 0.56 | 0.75 | 0.33 |
| 2004 | 0.66 | 1.15 | 0.36 |