| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.16 | 8.18 | 6.17 |
| 2024 | 6.09 | 8.67 | 4.76 |
| 2023 | 8.26 | 13.06 | 4.98 |
| 2022 | 6.24 | 7.83 | 5.23 |
| 2021 | 5.62 | 8.14 | 4.78 |
| 2020 | 3.62 | 5.49 | 2.7 |
| 2019 | 3.11 | 3.83 | 2.71 |
| 2018 | 3.96 | 5.53 | 2.63 |
| 2017 | 5.83 | 7.06 | 4.62 |
| 2016 | 6.16 | 6.9 | 5.59 |
| 2015 | 6.58 | 9.65 | 4.62 |
| 2014 | 5.63 | 6.2 | 5.01 |
| 2013 | 4.88 | 6.27 | 3.46 |
| 2012 | 5.01 | 5.81 | 4.21 |
| 2011 | 5.61 | 6.84 | 4.55 |
| 2010 | 6.46 | 7.77 | 5.25 |
| 2009 | 4.99 | 6.09 | 3.34 |
| 2008 | 4.96 | 9.72 | 2.43 |
| 2007 | 8.28 | 11.02 | 6.09 |
| 2006 | 5.14 | 6.46 | 4.31 |
| 2005 | 4.43 | 9.57 | 3.38 |
| 2004 | 5.02 | 7.97 | 2.95 |