| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.48 | 10.77 | 5.44 |
| 2024 | 8.5 | 16.39 | 5.92 |
| 2023 | 12.13 | 15.78 | 9.97 |
| 2022 | 13.21 | 22.64 | 9.29 |
| 2021 | 12.43 | 15.52 | 9.2 |
| 2020 | 11.03 | 16.97 | 7.69 |
| 2019 | 10.49 | 14.2 | 5.68 |
| 2018 | 8.69 | 15.41 | 4.91 |
| 2017 | 17.26 | 23.17 | 14.01 |
| 2016 | 33.12 | 39 | 20.87 |
| 2015 | 21.22 | 46.1 | 8.31 |
| 2014 | 7.76 | 11.98 | 5.96 |
| 2013 | 6.64 | 8.98 | 5.33 |
| 2012 | 5.01 | 6.19 | 4.1 |
| 2011 | 7.12 | 9.83 | 4.45 |
| 2010 | 11.67 | 18.26 | 8.22 |
| 2009 | 69.56 | 133.18 | 16.54 |
| 2008 | 0 | ||
| 2007 | 0 | ||
| 2006 | 0 | ||
| 2005 | 0 | ||
| 2004 | 0 | -1.13 | |
| 2003 | 0 | -3.52 | |
| 2002 | 72.86 | 121.39 | 4.23 |
| 2001 | 10.32 | 12.52 | 7.19 |
| 2000 | 10.43 | 14.71 | 6.73 |
| 1999 | 4.21 | 5.19 | 3.5 |
| 1998 | 4.82 | 6.24 | 3.36 |
| 1997 | 6.35 | 9.62 | 3.54 |