| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.52 | 6.25 | 2.92 |
| 2023 | 7.47 | 8.84 | 6.01 |
| 2022 | 8.18 | 13.21 | 5.56 |
| 2021 | 15.08 | 21.26 | 10.57 |
| 2020 | 10.39 | 14.31 | 5.72 |
| 2019 | 7.41 | 8.93 | 5.2 |
| 2018 | 9.33 | 13.92 | 4.65 |
| 2017 | 10.91 | 14.16 | 8.12 |
| 2016 | 8.17 | 10.41 | 6.36 |
| 2015 | 11.91 | 22.75 | 5.88 |
| 2014 | 12.99 | 20.65 | 4.43 |
| 2013 | 5.2 | 6.19 | 4.07 |
| 2012 | 6.59 | 9.08 | 4.74 |
| 2011 | 5.91 | 6.91 | 5.1 |
| 2010 | 6.79 | 10.1 | 4.83 |
| 2009 | 6.94 | 9.75 | 4.82 |
| 2008 | 9.79 | 14.96 | 3.52 |
| 2007 | 10.23 | 13.64 | 8.2 |
| 2006 | 5.3 | 10.06 | 2.76 |
| 2005 | 3.01 | 4.18 | 1.85 |
| 2004 | 2.44 | 3.24 | 1.96 |