| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.48 | 2.99 | 1.97 |
| 2023 | 2.35 | 3.48 | 1.68 |
| 2022 | 1.98 | 2.8 | 1.6 |
| 2021 | 1.79 | 2.82 | 0.86 |
| 2020 | 1.6 | 2.31 | 1 |
| 2019 | 1.66 | 2.31 | 1.23 |
| 2018 | 2.18 | 3.23 | 1.58 |
| 2017 | 3.14 | 4.31 | 2.14 |
| 2016 | 61.07 | 146.65 | 3.73 |
| 2015 | 32.06 | 107.63 | 13.64 |
| 2014 | 9.07 | 13.64 | 5.76 |
| 2013 | 6.23 | 8.64 | 3.53 |
| 2012 | 3.16 | 3.78 | 2.34 |
| 2011 | 4.35 | 5.59 | 2.5 |
| 2010 | 4.93 | 6.22 | 3.86 |
| 2009 | 4.32 | 7.02 | 1.9 |
| 2008 | 3.1 | 5.46 | 1.47 |
| 2007 | 4.72 | 7.39 | 2.91 |
| 2006 | 3.66 | 5.39 | 2.58 |
| 2005 | 7.91 | 14.44 | 2.01 |
| 2004 | 14.55 | 16.53 | 13.9 |
| 2003 | 15.39 | 16.92 | 14.53 |
| 2002 | 16.3 | 18.9 | 13.21 |
| 2001 | 20.38 | 22.92 | 13.33 |
| 2000 | 13.34 | 24.25 | 5.86 |
| 1999 | 6.23 | 7.77 | 4.99 |
| 1998 | 8.83 | 10.76 | 5.7 |
| 1997 | 7.24 | 9.27 | 4.94 |