| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.38 | 4.09 | 2.77 |
| 2023 | 4.48 | 5.73 | 3.14 |
| 2022 | 6.02 | 8.61 | 4.88 |
| 2021 | 8.11 | 9.94 | 6.19 |
| 2020 | 5.97 | 7.63 | 4.12 |
| 2019 | 4.24 | 5.43 | 3.53 |
| 2018 | 4.81 | 6.47 | 3.45 |
| 2017 | 5.78 | 6.7 | 4.88 |
| 2016 | 5.01 | 6.17 | 3.57 |
| 2015 | 6.01 | 8.7 | 4.19 |
| 2014 | 5.98 | 10.46 | 3.91 |
| 2013 | 74.42 | 641.38 | 4.42 |
| 2012 | 472.72 | 533.59 | 415.07 |
| 2011 | 0 | -13.23 | |
| 2010 | 6991.02 | 19746.1 | 23.87 |
| 2009 | 20.23 | 33.44 | 7.62 |
| 2008 | 11.16 | 18.61 | 5.13 |
| 2007 | 9.41 | 15.24 | 3.28 |
| 2006 | 3.84 | 5.15 | 2.69 |
| 2005 | 3.24 | 4.53 | 2.24 |
| 2004 | 3.45 | 4.83 | 2.45 |
| 2003 | 5.11 | 8.47 | 3.21 |
| 2002 | 9.8 | 11.52 | 8.1 |
| 2001 | 13.27 | 18.08 | 9.96 |
| 2000 | 9.3 | 12.1 | 6.26 |
| 1999 | 5.89 | 10.17 | 3.62 |
| 1998 | 3.36 | 4.5 | 2.22 |
| 1997 | 2.67 | 4.03 | 2.09 |