| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.27 | 4.87 | 3.8 |
| 2024 | 3.69 | 5.9 | 2.71 |
| 2023 | 3.75 | 5.23 | 2.44 |
| 2022 | 2.5 | 4.15 | 1.8 |
| 2021 | 1.53 | 1.95 | 1.23 |
| 2020 | 1.62 | 2.03 | 1.3 |
| 2019 | 1.9 | 2.48 | 1.58 |
| 2018 | 2.54 | 3.61 | 1.67 |
| 2017 | 3.87 | 4.45 | 3.38 |
| 2016 | 3.88 | 5.4 | 3.03 |
| 2015 | 4.2 | 7.57 | 2.74 |
| 2014 | 3.09 | 3.83 | 2.65 |
| 2013 | 2.95 | 3.78 | 2.42 |
| 2012 | 3.22 | 3.88 | 2.55 |
| 2011 | 0 | -12.91 | |
| 2010 | 211.04 | 241.15 | 185.45 |
| 2009 | 63.62 | 217.72 | 14.24 |
| 2008 | 30.04 | 80.6 | 11.2 |
| 2007 | 97.23 | 480.69 | 2.78 |
| 2006 | 2.49 | 3.33 | 1.73 |
| 2005 | 2.23 | 3.58 | 1.38 |
| 2004 | 8.05 | 16.48 | 3.11 |
| 2003 | 15.28 | 19.88 | 11.45 |
| 2002 | 16.07 | 22.53 | 11.94 |
| 2001 | 18.57 | 21.96 | 15.55 |
| 2000 | 26.92 | 46.44 | 11.74 |
| 1999 | 7.92 | 10.68 | 5.51 |
| 1998 | 5.93 | 9.45 | 3.54 |
| 1997 | 4.74 | 7 | 3.38 |