| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.9 | 10.69 | 6.13 |
| 2024 | 6.64 | 10.62 | 4 |
| 2023 | 5.81 | 11.15 | 4.95 |
| 2022 | 5.6 | 7.88 | 4.71 |
| 2021 | 6.98 | 9.1 | 5.21 |
| 2020 | 8.93 | 11.47 | 6.26 |
| 2019 | 5 | 8.66 | 3.57 |
| 2018 | 15.11 | 28.67 | 4.63 |
| 2017 | 46.86 | 82.51 | 27.24 |
| 2016 | 81.86 | 150.43 | 61.63 |
| 2015 | 107.84 | 194.81 | 54.05 |
| 2014 | 54.46 | 100.47 | 44.08 |
| 2013 | 132.16 | 281.24 | 54 |
| 2012 | 19.31 | 66.61 | 5.4 |
| 2011 | 4.75 | 5.43 | 3.92 |
| 2010 | 3.78 | 4.55 | 2.86 |
| 2009 | 3.77 | 5.27 | 2.93 |
| 2008 | 5.27 | 8.94 | 2.13 |
| 2007 | 5.37 | 8.79 | 1.67 |
| 2006 | 1.78 | 2.38 | 1.43 |
| 2005 | 1.56 | 1.99 | 1.07 |
| 2004 | 2.57 | 4.31 | 1.41 |