| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.07 | 22.44 | 14.99 |
| 2024 | 15.09 | 21.76 | 11.21 |
| 2023 | 20.49 | 30.3 | 13.47 |
| 2022 | 30.83 | 39.13 | 23.35 |
| 2021 | 19.12 | 35 | 5.33 |
| 2020 | 16.67 | 20.41 | 12.97 |
| 2019 | 11.48 | 21.35 | 4.4 |
| 2018 | 11.41 | 15.16 | 5.12 |
| 2017 | 14.73 | 16.23 | 13.34 |
| 2016 | 14.85 | 16.92 | 9.76 |
| 2015 | 15.81 | 19.75 | 7.4 |
| 2014 | 9.13 | 11.4 | 7.01 |
| 2013 | 13.2 | 18.29 | 10.06 |
| 2012 | 10.94 | 14.17 | 5.37 |
| 2011 | 6.47 | 7.29 | 4.8 |
| 2010 | 0 | -17.36 | |
| 2009 | 0 | -9.46 | |
| 2008 | 0 | -9.65 | |
| 2007 | 16.44 | 143.16 | 5.8 |
| 2006 | 5.64 | 6.88 | 3.74 |
| 2005 | 4.55 | 6.42 | 2.01 |
| 2004 | 3.81 | 5.98 | 2.4 |
| 2003 | 6.46 | 10.13 | 3.53 |
| 2002 | 12.5 | 16.83 | 7.7 |
| 2001 | 109.79 | 128.32 | 78.85 |
| 2000 | 7.7 | 11.64 | 4.8 |
| 1999 | 4.76 | 6.57 | 3.34 |
| 1998 | 4.47 | 5.93 | 3.01 |
| 1997 | 5.23 | 7.84 | 2.38 |