| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.65 | 6.16 | 3.29 |
| 2023 | 7.01 | 10.72 | 4.24 |
| 2022 | 11.64 | 15.23 | 8.01 |
| 2021 | 11.24 | 18.64 | 7.29 |
| 2020 | 5.65 | 8.99 | 3.99 |
| 2019 | 3.98 | 4.73 | 3.33 |
| 2018 | 4.5 | 5.37 | 3.57 |
| 2017 | 5.12 | 6.7 | 3.89 |
| 2016 | 4.43 | 5.25 | 3.22 |
| 2015 | 4.34 | 5.64 | 3.07 |
| 2014 | 4.2 | 5.36 | 3.21 |
| 2013 | 2.79 | 3.45 | 2.31 |
| 2012 | 2.58 | 3.52 | 1.96 |
| 2011 | 4.3 | 6.01 | 2.65 |
| 2010 | 5.15 | 6.73 | 3.54 |
| 2009 | 2.8 | 3.92 | 1.49 |
| 2008 | 3.14 | 6.42 | 1.24 |
| 2007 | 5.1 | 6.33 | 3.59 |
| 2006 | 3.16 | 3.94 | 2.59 |
| 2005 | 2.4 | 3.18 | 1.46 |
| 2004 | 3.48 | 4.3 | 2.89 |
| 2003 | 3.99 | 8.61 | 2.74 |