| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.42 | 6.11 | 3.74 |
| 2024 | 2.7 | 6.2 | 2.01 |
| 2023 | 3.33 | 4.87 | 2.61 |
| 2022 | 2.97 | 5.59 | 2.03 |
| 2021 | 3.09 | 5.08 | 2.34 |
| 2020 | 3.85 | 4.78 | 2.79 |
| 2019 | 5.34 | 7.73 | 3.52 |
| 2018 | 6.91 | 8.37 | 5.2 |
| 2017 | 5.37 | 6.52 | 4.31 |
| 2016 | 7.91 | 11.91 | 6.07 |
| 2015 | 16.52 | 34.02 | 8.89 |
| 2014 | 47.26 | 101.86 | 10.65 |
| 2013 | 13.08 | 25.37 | 8.15 |
| 2012 | 0 | ||
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 4.49 | 5.28 | 3.33 |
| 2008 | 4.66 | 6.71 | 2.38 |
| 2007 | 4.48 | 5.8 | 2.15 |
| 2006 | 1.94 | 2.55 | 1.59 |
| 2005 | 1.75 | 2.31 | 1.22 |
| 2004 | 2.94 | 4.33 | 1.96 |
| 2003 | 3.76 | 4.91 | 2.69 |
| 2002 | 6.13 | 6.8 | 5.23 |
| 2001 | 7.7 | 9.33 | 5.56 |
| 2000 | 18.44 | 23.18 | 10.3 |
| 1999 | 9.47 | 14.46 | 6.01 |
| 1998 | 8.07 | 10.42 | 6.34 |