| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2021 | 44.7 | 56.74 | 34.71 |
| 2020 | 45.16 | 61.64 | 37.67 |
| 2019 | 35.22 | 50.91 | 24.98 |
| 2018 | 34.91 | 45.11 | 24.43 |
| 2017 | 42.03 | 49.72 | 35.43 |
| 2016 | 40.26 | 47.47 | 30.66 |
| 2015 | 47.45 | 85.99 | 30.89 |
| 2014 | 39.25 | 48.45 | 32.28 |
| 2013 | 40.33 | 50.86 | 35.11 |
| 2012 | 41.87 | 54.84 | 30.64 |
| 2011 | 45.61 | 62.09 | 33.05 |
| 2010 | 47.89 | 64.09 | 37.68 |
| 2009 | 36.45 | 53.99 | 18 |
| 2008 | 25.24 | 49.44 | 11.52 |