| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 17.94 | 20.87 | 15.83 |
| 2019 | 19.22 | 24.88 | 16.82 |
| 2018 | 24.23 | 31.33 | 18.09 |
| 2017 | 20.78 | 34.4 | 16.54 |
| 2016 | 40.33 | 53.06 | 19.15 |
| 2015 | 64.61 | 97.59 | 43.42 |
| 2014 | 54.32 | 82.79 | 30.38 |
| 2013 | 45.92 | 79.48 | 26.13 |
| 2012 | 57.78 | 72.49 | 31 |
| 2011 | 60.48 | 91.11 | 36.09 |
| 2010 | 88.54 | 118.43 | 50.4 |
| 2009 | 80.24 | 132.21 | 37.61 |
| 2008 | 36.06 | 76.28 | 12.09 |
| 2007 | 112.89 | 323.64 | 26.7 |
| 2006 | 32.44 | 39.67 | 22.6 |
| 2005 | 33 | 39.86 | 25.62 |
| 2004 | 53.2 | 76.76 | 37.11 |
| 2003 | 76.28 | 101.08 | 59.16 |
| 2002 | 70.84 | 81.08 | 55.88 |
| 2001 | 76.53 | 92.96 | 55.74 |