| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 1.55 | 2.03 | 1.14 |
| 2023 | 2.42 | 3.48 | 1.36 |
| 2022 | 3.7 | 4.91 | 2.69 |
| 2021 | 4.79 | 7.09 | 3.52 |
| 2020 | 39.98 | 90.12 | 4.74 |
| 2019 | 38.1 | 102.94 | 19.6 |
| 2018 | 38.98 | 120.22 | 16.75 |
| 2017 | 69.61 | 140.71 | 31.64 |
| 2016 | 25.98 | 32.63 | 14.96 |
| 2015 | 18.97 | 38.77 | 9.29 |
| 2014 | 9.69 | 12.67 | 6.73 |
| 2013 | 8.54 | 10.82 | 6.64 |
| 2012 | 8.46 | 10.66 | 6.39 |
| 2011 | 10.43 | 13.98 | 6.88 |
| 2010 | 8.73 | 10.77 | 6.88 |
| 2009 | 6.56 | 9.05 | 3.76 |
| 2008 | 7.44 | 14.53 | 2.82 |
| 2007 | 10.44 | 19.45 | 4.47 |
| 2006 | 4.42 | 6.56 | 2.84 |
| 2005 | 6.99 | 7.71 | 6.44 |
| 2004 | 7.65 | 9.03 | 7.2 |
| 2003 | 9.1 | 9.72 | 8.03 |
| 2002 | 9.43 | 10.36 | 7.57 |
| 2001 | 12.59 | 13.51 | 9.94 |
| 2000 | 10.7 | 14.78 | 4.96 |
| 1999 | 4.76 | 5.96 | 3.75 |