| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 16.14 | 23.61 | 13.52 |
| 2024 | 12.29 | 19.42 | 8.95 |
| 2023 | 49.59 | 536.09 | 5.35 |
| 2022 | 378.15 | 577.73 | 8.99 |
| 2021 | 7.68 | 9.5 | 6.59 |
| 2020 | 8.24 | 12.37 | 4.92 |
| 2019 | 7.7 | 10.05 | 6.38 |
| 2018 | 9.97 | 14.79 | 7.42 |
| 2017 | 18.38 | 22.46 | 14.67 |
| 2016 | 24.05 | 27.41 | 20.8 |
| 2015 | 23.88 | 39.39 | 17.51 |
| 2014 | 16.04 | 21.1 | 14.42 |
| 2013 | 15.64 | 18.47 | 11.33 |
| 2012 | 11.49 | 12.86 | 9.96 |
| 2011 | 11.56 | 14.93 | 9.39 |
| 2010 | 14.55 | 22.95 | 10.46 |
| 2009 | 18.39 | 27.07 | 10.23 |
| 2008 | 19.59 | 42.56 | 8.38 |
| 2007 | 42.2 | 78.43 | 17.79 |
| 2006 | 14.08 | 17.83 | 8.77 |
| 2005 | 2.13 | 9.84 | 0.36 |
| 2004 | 0.63 | 0.87 | 0.46 |
| 2003 | 0.73 | 0.87 | 0.58 |
| 2002 | 0.84 | 0.91 | 0.7 |
| 2001 | 0.92 | 1.4 | 0.56 |
| 2000 | 0.49 | 0.68 | 0.34 |
| 1999 | 0.47 | 0.89 | 0.28 |
| 1998 | 0.63 | 0.97 | 0.38 |
| 1997 | 1.2 | 2.05 | 0.68 |