| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 6.73 | 8.28 | 5.26 |
| 2023 | 11.83 | 20.01 | 6.88 |
| 2022 | 22.93 | 29.2 | 18.01 |
| 2021 | 25.79 | 39.02 | 18.05 |
| 2020 | 16.23 | 27.78 | 9.35 |
| 2019 | 10.32 | 13.86 | 7.9 |
| 2018 | 13.28 | 19.29 | 7.86 |
| 2017 | 13.16 | 18.5 | 9.4 |
| 2016 | 20.12 | 29.13 | 14.26 |
| 2015 | 21.64 | 33.65 | 13.09 |
| 2014 | 16.53 | 21.09 | 12.24 |
| 2013 | 15.47 | 21.8 | 11.64 |
| 2012 | 12.61 | 20.51 | 7.52 |
| 2011 | 8.84 | 11.2 | 7.07 |
| 2010 | 6.24 | 11.21 | 4.93 |
| 2009 | 4.17 | 5.79 | 2.43 |
| 2008 | 3.48 | 6.54 | 1.69 |
| 2007 | 5.72 | 7.31 | 4.38 |
| 2006 | 3.75 | 4.64 | 2.23 |