| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.8 | 3.21 | 2.22 |
| 2023 | 3.67 | 4.85 | 2.98 |
| 2022 | 5.35 | 8.06 | 3.29 |
| 2021 | 7.31 | 12.39 | 5.4 |
| 2020 | 5.49 | 6.57 | 4.5 |
| 2019 | 5.7 | 8.29 | 3.35 |
| 2018 | 4.55 | 6.2 | 3.32 |
| 2017 | 12.94 | 35.78 | 5.56 |
| 2016 | 28.2 | 45.38 | 10.2 |
| 2015 | 17.16 | 23.69 | 10.67 |
| 2014 | 19.86 | 26.88 | 12.71 |
| 2013 | 23.45 | 31.82 | 17.61 |
| 2012 | 29.93 | 41.09 | 17.03 |
| 2011 | 46.24 | 70.74 | 18.74 |
| 2010 | 34.17 | 83.27 | 16.06 |
| 2009 | 349.42 | 1857.02 | 15.7 |
| 2008 | 0 | ||
| 2007 | 278.2 | 1622.16 | 26.84 |
| 2006 | 12.54 | 31.68 | 1.27 |
| 2005 | 1.46 | 1.83 | 1.02 |
| 2004 | 2.51 | 3.8 | 1.71 |
| 2003 | 2.89 | 3.77 | 2.11 |
| 2002 | 4.22 | 5.23 | 2.55 |
| 2001 | 5.17 | 6.87 | 3.44 |