| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.03 | 6.56 | 5.48 |
| 2024 | 4.69 | 6.24 | 3.93 |
| 2023 | 3.63 | 4.16 | 3.09 |
| 2022 | 3 | 3.52 | 2.34 |
| 2021 | 3.93 | 6.86 | 2.28 |
| 2020 | 5.77 | 6.55 | 4.34 |
| 2019 | 5.39 | 6.01 | 4.88 |
| 2018 | 5.23 | 5.93 | 4.59 |
| 2017 | 5.88 | 7.25 | 5.26 |
| 2016 | 5.58 | 9.55 | 3.9 |
| 2015 | 5.19 | 7.22 | 3.95 |
| 2014 | 3.18 | 4.63 | 2.65 |
| 2013 | 3.22 | 3.79 | 2.79 |
| 2012 | 3.66 | 4.3 | 3.21 |
| 2011 | 5.23 | 6.34 | 3.82 |
| 2010 | 7.07 | 8.63 | 5.89 |
| 2009 | 6.75 | 8.12 | 4.74 |
| 2008 | 7.35 | 11.82 | 4.43 |
| 2007 | 9.88 | 14.12 | 5.81 |
| 2006 | 5.05 | 5.8 | 4.33 |
| 2005 | 4.86 | 5.95 | 2.93 |
| 2004 | 4.03 | 6.62 | 2.89 |