| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 26.92 | 30.2 | 24.78 |
| 2024 | 14.2 | 37.66 | 5.47 |
| 2023 | 18.42 | 37.11 | 9.13 |
| 2022 | 30.45 | 49.8 | 13.48 |
| 2021 | 22.18 | 37.17 | 12.93 |
| 2020 | 15.67 | 29.47 | 7.15 |
| 2019 | 4.58 | 8.13 | 2.71 |
| 2018 | 3.02 | 3.37 | 2.5 |
| 2017 | 3.02 | 3.77 | 2.45 |
| 2016 | 4.19 | 4.9 | 3.36 |
| 2015 | 3.96 | 6.4 | 2.66 |
| 2014 | 1.95 | 3.1 | 1.5 |
| 2013 | 3.34 | 8.13 | 1.69 |
| 2012 | 5.3 | 7.71 | 2.56 |
| 2011 | 4.4 | 5.97 | 2.69 |
| 2010 | 4.8 | 6.79 | 3.55 |
| 2009 | 5.26 | 7.32 | 2.6 |
| 2008 | 5.87 | 15.7 | 1.71 |
| 2007 | 13.58 | 31.74 | 3.19 |
| 2006 | 5.45 | 10.75 | 2.48 |
| 2005 | 3.63 | 8.31 | 1.25 |
| 2004 | 2.41 | 4.98 | 1.41 |