| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2023 | 33.02 | 41.55 | 19.95 |
| 2022 | 30.16 | 38.67 | 18.19 |
| 2021 | 13.84 | 22.7 | 10.14 |
| 2020 | 10.96 | 12.42 | 9.84 |
| 2019 | 12.9 | 15.18 | 10.69 |
| 2018 | 14.34 | 16.29 | 12.49 |
| 2017 | 13.54 | 15.66 | 10.57 |
| 2016 | 9.02 | 11.19 | 7.39 |
| 2015 | 13.62 | 17.2 | 9.95 |
| 2014 | 10.01 | 14.15 | 8.42 |
| 2013 | 19.12 | 37.56 | 9.23 |
| 2012 | 62.07 | 103.96 | 27.43 |
| 2011 | 27.04 | 38.2 | 17.41 |
| 2010 | 52.14 | 124.15 | 17.76 |
| 2009 | 94.18 | 139.01 | 36.35 |
| 2008 | 24.11 | 36.35 | 14.46 |
| 2007 | 28.34 | 37.68 | 17.73 |
| 2006 | 11.21 | 18.61 | 7.61 |
| 2005 | 10.7 | 13.48 | 6.66 |
| 2004 | 19.41 | 26.78 | 8.66 |
| 2003 | 43.67 | 72.18 | 16.12 |
| 2002 | 0 | -27.17 | |
| 2001 | 301.14 | 608.33 | 49.86 |
| 2000 | 0 | -42.65 | |
| 1999 | 46.96 | 67.07 | 34.54 |
| 1998 | 28.57 | 36.91 | 20.4 |
| 1997 | 34.1 | 54.24 | 19.37 |