| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 9.27 | 13.64 | 4.26 |
| 2023 | 10.07 | 14.6 | 6.46 |
| 2022 | 10.29 | 16.73 | 4.4 |
| 2021 | 4.43 | 6.04 | 3.68 |
| 2020 | 6 | 7.82 | 4.31 |
| 2019 | 6.27 | 9.7 | 4.9 |
| 2018 | 7.43 | 11.19 | 4.16 |
| 2017 | 13.1 | 21.24 | 10.01 |
| 2016 | 21.68 | 35.6 | 15.15 |
| 2015 | 38.98 | 61.07 | 20.54 |
| 2014 | 15.57 | 23.55 | 9.9 |
| 2013 | 10.58 | 12.87 | 8.96 |
| 2012 | 9.46 | 11.75 | 6.87 |
| 2011 | 11.15 | 16.29 | 6.97 |
| 2010 | 13.6 | 20.19 | 9.24 |
| 2009 | 13.74 | 19.3 | 8.56 |
| 2008 | 9.34 | 16.56 | 3.21 |
| 2007 | 11.5 | 18.08 | 5.32 |
| 2006 | 6.08 | 7.04 | 5.05 |
| 2005 | 4.74 | 6.87 | 3.44 |
| 2004 | 7.91 | 15.6 | 4.21 |
| 2003 | 20.61 | 26.27 | 11.25 |
| 2002 | 28.84 | 35.73 | 22.29 |
| 2001 | 0 | -6.02 | |
| 2000 | 0 | -15.86 | |
| 1999 | 15.72 | 29.83 | 4.85 |
| 1998 | 3.6 | 5.34 | 2.22 |
| 1997 | 3.15 | 5.06 | 1.66 |