| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2023 | 12.5 | 15.25 | 5.14 |
| 2022 | 21.37 | 33 | 13.62 |
| 2021 | 42.95 | 65.38 | 29.2 |
| 2020 | 32.89 | 61.73 | 18.19 |
| 2019 | 22.14 | 29.35 | 14.38 |
| 2018 | 17.48 | 30.77 | 9.14 |
| 2017 | 23.3 | 33.4 | 15.7 |
| 2016 | 36.18 | 47.19 | 23.64 |
| 2015 | 31.03 | 58.09 | 22.59 |
| 2014 | 25.29 | 33.84 | 19.89 |
| 2013 | 36.31 | 50.36 | 23.44 |
| 2012 | 53.75 | 76.65 | 32 |
| 2011 | 44.6 | 84.05 | 27.91 |
| 2010 | 54.62 | 81.54 | 36.99 |
| 2009 | 53.94 | 81.19 | 30.1 |
| 2008 | 66.31 | 139.1 | 19.06 |
| 2007 | 53.78 | 83.07 | 28.97 |
| 2006 | 21.62 | 30.43 | 16.51 |
| 2005 | 16.98 | 20.24 | 13.38 |