| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.62 | 6.76 | 6.47 |
| 2024 | 7.8 | 10.1 | 6.15 |
| 2023 | 21.49 | 42.47 | 8.44 |
| 2022 | 31.43 | 41.96 | 24.15 |
| 2021 | 23.81 | 28.46 | 17.26 |
| 2020 | 15.61 | 25.56 | 10.51 |
| 2019 | 13.96 | 17.19 | 10.19 |
| 2018 | 12 | 14.32 | 9.72 |
| 2017 | 9.61 | 11.43 | 7.56 |
| 2016 | 8.23 | 9.22 | 7.43 |
| 2015 | 8.93 | 13.11 | 6.33 |
| 2014 | 5.13 | 7 | 4.54 |
| 2013 | 5.44 | 6.59 | 4.63 |
| 2012 | 5.14 | 5.67 | 4.43 |
| 2011 | 5.99 | 7.19 | 5.1 |
| 2010 | 8.1 | 11.77 | 5.74 |
| 2009 | 8.45 | 10.27 | 6.8 |
| 2008 | 12.39 | 24.56 | 6.14 |
| 2007 | 21.48 | 27.18 | 13.32 |
| 2006 | 10.03 | 12.57 | 8.17 |
| 2005 | 11.8 | 14.48 | 8.34 |
| 2004 | 9.73 | 13.81 | 8.01 |