| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.42 | 1.6 | 1.31 |
| 2024 | 1.45 | 1.85 | 1.19 |
| 2023 | 0 | -1.53 | |
| 2022 | 24.36 | 46.18 | 2.6 |
| 2021 | 3.07 | 4.06 | 2.3 |
| 2020 | 2.67 | 3.29 | 2.22 |
| 2019 | 2.71 | 3.8 | 1.27 |
| 2018 | 1.69 | 2.32 | 1.29 |
| 2017 | 3.85 | 9.21 | 1.71 |
| 2016 | 4.42 | 8.56 | 1.58 |
| 2015 | 1.95 | 3.77 | 1.24 |
| 2014 | 1.03 | 1.66 | 0.8 |
| 2013 | 1.1 | 1.44 | 0.91 |
| 2012 | 1.53 | 2.09 | 1.06 |
| 2011 | 2.61 | 3.31 | 1.62 |
| 2010 | 2.64 | 3.5 | 1.75 |
| 2009 | 2.61 | 4.17 | 1.18 |
| 2008 | 3.18 | 7.47 | 0.87 |
| 2007 | 3.66 | 7.58 | 1.47 |
| 2006 | 1.43 | 1.95 | 1.04 |
| 2005 | 1.17 | 1.66 | 0.83 |
| 2004 | 2.09 | 3.29 | 1.48 |
| 2003 | 2.52 | 3.32 | 2.08 |
| 2002 | 2.38 | 2.71 | 1.72 |
| 2001 | 3.33 | 3.94 | 2.56 |
| 2000 | 3.97 | 5.34 | 3.24 |
| 1999 | 6.05 | 12.25 | 3.63 |
| 1998 | 4.12 | 6.48 | 2.34 |