| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.33 | 4.87 | 4.15 |
| 2024 | 4.43 | 5.25 | 3.58 |
| 2023 | 5.35 | 6.64 | 4.65 |
| 2022 | 0 | -1.27 | |
| 2021 | 12.65 | 46.12 | 3.33 |
| 2020 | 2.71 | 4.91 | 1.93 |
| 2019 | 2.35 | 3.09 | 1.95 |
| 2018 | 2.2 | 2.84 | 1.71 |
| 2017 | 2.52 | 2.97 | 2.06 |
| 2016 | 2.94 | 3.89 | 2.59 |
| 2015 | 4.37 | 8.55 | 2.61 |
| 2014 | 2.07 | 3.18 | 1.51 |
| 2013 | 1.7 | 1.93 | 1.49 |
| 2012 | 1.55 | 1.88 | 1.3 |
| 2011 | 2.11 | 2.53 | 1.72 |
| 2010 | 2.36 | 3.24 | 1.7 |
| 2009 | 1.84 | 3.28 | 1.05 |
| 2008 | 1.58 | 2.79 | 0.83 |
| 2007 | 2.32 | 3.8 | 0.98 |
| 2006 | 1.12 | 1.37 | 0.85 |
| 2005 | 0.78 | 1.04 | 0.54 |
| 2004 | 1.41 | 1.89 | 0.97 |
| 2003 | 1.52 | 1.85 | 1.31 |
| 2002 | 1.7 | 1.87 | 1.38 |
| 2001 | 2.14 | 2.75 | 1.54 |
| 2000 | 2.59 | 3.29 | 1.85 |
| 1999 | 2.17 | 2.66 | 1.7 |
| 1998 | 2.47 | 3.4 | 1.91 |
| 1997 | 3.37 | 5.73 | 1.98 |