| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.1 | 8.47 | 2.45 |
| 2023 | 4.45 | 7.13 | 2.81 |
| 2022 | 3.22 | 4.33 | 2.2 |
| 2021 | 3.83 | 7.34 | 1.79 |
| 2020 | 1.42 | 2.29 | 0.99 |
| 2019 | 1.6 | 2.52 | 1.04 |
| 2018 | 74.77 | 272.2 | 1.63 |
| 2017 | 52.21 | 54.13 | 46.77 |
| 2016 | 36.55 | 47.53 | 15.21 |
| 2015 | 29.5 | 52.79 | 16.91 |
| 2014 | 17.62 | 29.85 | 12.35 |
| 2013 | 14.19 | 16.94 | 12.15 |
| 2012 | 13.25 | 17.41 | 10.19 |
| 2011 | 14.8 | 16.44 | 10.7 |
| 2010 | 16.59 | 20.81 | 12.07 |
| 2009 | 15.71 | 21.63 | 8.49 |
| 2008 | 14.14 | 31.75 | 5.28 |
| 2007 | 23.35 | 38.9 | 4.45 |
| 2006 | 3.16 | 4.45 | 2.1 |
| 2005 | 2.97 | 4.84 | 1.92 |
| 2004 | 5.26 | 8.49 | 3.81 |
| 2003 | 6.45 | 7.77 | 4.51 |
| 2002 | 10.13 | 12.19 | 7.1 |
| 2001 | 15.25 | 20.45 | 8.64 |
| 2000 | 23.39 | 27.7 | 13.58 |
| 1999 | 11.57 | 16.97 | 8.83 |
| 1998 | 7.39 | 11.38 | 4.18 |
| 1997 | 4.87 | 7.28 | 3.43 |