| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.89 | 14.43 | 8.8 |
| 2024 | 10.71 | 15.45 | 7.69 |
| 2023 | 17.41 | 23.42 | 13.95 |
| 2022 | 16.74 | 23.76 | 10.86 |
| 2021 | 16.11 | 20 | 12.11 |
| 2020 | 9.83 | 14.43 | 8.13 |
| 2019 | 12.22 | 18.33 | 9.32 |
| 2018 | 16.13 | 24.5 | 8.72 |
| 2017 | 25.49 | 39.47 | 17.03 |
| 2016 | 27.52 | 40.51 | 17.32 |
| 2015 | 26.32 | 53.26 | 14.85 |
| 2014 | 12.6 | 18.94 | 7.88 |
| 2013 | 11.3 | 13.76 | 8.64 |
| 2012 | 11.67 | 13.97 | 9.06 |
| 2011 | 17.14 | 20.92 | 9.3 |
| 2010 | 16.03 | 19.68 | 11.67 |
| 2009 | 24.89 | 43.87 | 18.49 |
| 2008 | 381.3 | 1528.83 | 43.57 |
| 2007 | 663.88 | 1669.37 | 91.83 |
| 2006 | 6.15 | 6.95 | 5.55 |
| 2005 | 4.08 | 7.45 | 1.37 |
| 2004 | 10.64 | 30.25 | 2.43 |
| 2003 | 32.41 | 33.82 | 29.09 |
| 2002 | 31.4 | 32.84 | 30.03 |
| 2001 | 29.87 | 33.03 | 28.3 |
| 2000 | 27.34 | 31.77 | 16.82 |
| 1999 | 24.23 | 34.28 | 11.84 |
| 1998 | 16.66 | 24.83 | 7.08 |
| 1997 | 8.53 | 12.11 | 6.22 |