| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 8.74 | 10.06 | 7.25 |
| 2023 | 10.57 | 11.67 | 9.37 |
| 2022 | 11.66 | 14.78 | 8.2 |
| 2021 | 15.2 | 22.01 | 12.02 |
| 2020 | 13.28 | 18.29 | 9.99 |
| 2019 | 10.31 | 13.26 | 7.24 |
| 2018 | 9.2 | 11.74 | 6.43 |
| 2017 | 7.82 | 10.71 | 6.12 |
| 2016 | 5.24 | 6.18 | 4.13 |
| 2015 | 4.58 | 6.03 | 3.69 |
| 2014 | 3.85 | 4.7 | 3.2 |
| 2013 | 4.94 | 7.19 | 3.35 |
| 2012 | 8.59 | 9.8 | 6.45 |
| 2011 | 9.57 | 11.1 | 8.3 |
| 2010 | 9.56 | 11.74 | 7.55 |
| 2009 | 10.71 | 12.5 | 8.55 |
| 2008 | 17.2 | 31.35 | 7.64 |
| 2007 | 20.57 | 31.58 | 14.74 |
| 2006 | 8.11 | 15.51 | 3.83 |
| 2005 | 4.54 | 5.21 | 3.56 |
| 2004 | 3.37 | 4.2 | 2.18 |
| 2003 | 2.33 | 3.06 | 2.05 |
| 2002 | 7.11 | 17.64 | 2.79 |