| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 15.87 | 18.62 | 13.78 |
| 2018 | 19.32 | 26.47 | 14.18 |
| 2017 | 32.98 | 99.09 | 16.11 |
| 2016 | 45.19 | 51.92 | 36.46 |
| 2015 | 53.05 | 82.75 | 33.54 |
| 2014 | 38.43 | 46.84 | 32.74 |
| 2013 | 35.29 | 46.28 | 27.27 |
| 2012 | 29.65 | 34.89 | 25.43 |
| 2011 | 38.36 | 51.92 | 28.6 |
| 2010 | 51.06 | 72.83 | 38.35 |
| 2009 | 47.68 | 66.85 | 24.29 |
| 2008 | 26.85 | 52.15 | 15.36 |
| 2007 | 48.75 | 73.61 | 32.06 |
| 2006 | 28.72 | 36.17 | 21.75 |
| 2005 | 24.17 | 32.48 | 13.51 |