| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.57 | 4.07 | 3.02 |
| 2024 | 2.3 | 4.74 | 1.82 |
| 2023 | 2.87 | 3.41 | 2.55 |
| 2022 | 2.46 | 3.16 | 1.45 |
| 2021 | 1.94 | 2.73 | 1.58 |
| 2020 | 2.51 | 3.37 | 1.67 |
| 2019 | 1.79 | 2.5 | 1.39 |
| 2018 | 2.6 | 3.56 | 1.41 |
| 2017 | 3.26 | 3.51 | 2.94 |
| 2016 | 5.3 | 8.35 | 3.13 |
| 2015 | 10.47 | 14.02 | 4.48 |
| 2014 | 4.2 | 5.71 | 2.98 |
| 2013 | 3.75 | 4.35 | 3.27 |
| 2012 | 3.63 | 4.18 | 2.73 |
| 2011 | 10.59 | 14.91 | 3.59 |
| 2010 | 10.62 | 14.71 | 7.99 |
| 2009 | 7.7 | 9.41 | 5.82 |
| 2008 | 6.6 | 11.06 | 3.76 |
| 2007 | 5.85 | 8.57 | 3.26 |
| 2006 | 3.07 | 3.94 | 2.53 |
| 2005 | 3.35 | 4.52 | 2.24 |
| 2004 | 19.13 | 184.1 | 4.25 |
| 2003 | 0 | -5.36 | |
| 2002 | 5.34 | 6.42 | 3.49 |
| 2001 | 9.44 | 12.48 | 5.59 |
| 2000 | 8.76 | 11.14 | 4.64 |
| 1999 | 4.44 | 5.52 | 3.47 |
| 1998 | 4.35 | 5.79 | 3.38 |
| 1997 | 3.67 | 5.12 | 2.22 |