| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2023 | 38.55 | 44.27 | 26.81 |
| 2022 | 37.78 | 49.17 | 26.56 |
| 2021 | 53.87 | 81.23 | 35.51 |
| 2020 | 36.3 | 58.51 | 21.51 |
| 2019 | 27.15 | 36.44 | 16.87 |
| 2018 | 28.84 | 44.43 | 16.21 |
| 2017 | 34.43 | 42.77 | 27.72 |
| 2016 | 29.26 | 38.04 | 21.13 |
| 2015 | 31.88 | 51.35 | 12.87 |
| 2014 | 8.9 | 15.05 | 5.51 |
| 2013 | 8.56 | 13.49 | 6.52 |
| 2012 | 17.23 | 24.08 | 11.18 |
| 2011 | 25.77 | 32.76 | 19.52 |
| 2010 | 28 | 38.22 | 21.11 |
| 2009 | 27.41 | 38.63 | 16.71 |
| 2008 | 51.78 | 127.06 | 16.26 |
| 2007 | 105.95 | 153.85 | 70.41 |
| 2006 | 82.84 | 128.78 | 50.35 |
| 2005 | 77.11 | 96.55 | 59.9 |
| 2004 | 86.76 | 110.6 | 61.89 |
| 2003 | 65.48 | 91.11 | 56.17 |
| 2002 | 49.26 | 58.34 | 37.69 |
| 2001 | 33.1 | 39.3 | 25.74 |
| 2000 | 44.53 | 54.99 | 35.62 |
| 1999 | 29.04 | 43.21 | 23.39 |
| 1998 | 26.07 | 32.89 | 20.44 |
| 1997 | 26.75 | 47.2 | 11.69 |