| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2023 | 13.8 | 13.91 | 13.71 |
| 2022 | 13.1 | 17.38 | 9.97 |
| 2021 | 12.49 | 15.84 | 9.69 |
| 2020 | 13 | 15.81 | 10.15 |
| 2019 | 14.54 | 19.15 | 10.38 |
| 2018 | 25.61 | 34.95 | 16.81 |
| 2017 | 27.99 | 31.03 | 24.83 |
| 2016 | 28.4 | 34.09 | 23.96 |
| 2015 | 32.62 | 46.82 | 19.48 |
| 2014 | 27.84 | 39.64 | 19.3 |
| 2013 | 226.55 | 236.68 | 213.37 |
| 2012 | 143.74 | 219.2 | 88.42 |
| 2011 | 164.57 | 209.85 | 96.42 |
| 2010 | 148.2 | 180.25 | 120.14 |
| 2009 | 103.84 | 138.72 | 58.59 |
| 2008 | 75.91 | 148.7 | 41.17 |
| 2007 | 97.97 | 144.95 | 59.13 |
| 2006 | 58.47 | 72.78 | 44.63 |
| 2005 | 75.5 | 140.8 | 52.61 |
| 2004 | 126.04 | 161.52 | 70 |
| 2003 | 84.9 | 109.61 | 64.42 |
| 2002 | 136.67 | 306.72 | 68.38 |