| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.45 | 1.84 | 1.2 |
| 2024 | 1.29 | 1.66 | 1.01 |
| 2023 | 1.88 | 3.07 | 1.37 |
| 2022 | 2.1 | 2.98 | 1.67 |
| 2021 | 2.34 | 2.69 | 1.99 |
| 2020 | 3.27 | 4.18 | 2.42 |
| 2019 | 4.01 | 6.7 | 2.98 |
| 2018 | 3.94 | 6.17 | 2.85 |
| 2017 | 4.98 | 6.36 | 3.73 |
| 2016 | 7.29 | 14.14 | 4.72 |
| 2015 | 12.32 | 25.42 | 6.14 |
| 2014 | 7.64 | 11.8 | 5.55 |
| 2013 | 6.45 | 11 | 4.22 |
| 2012 | 8.24 | 11.02 | 4.18 |
| 2011 | 12.83 | 17.09 | 6.94 |
| 2010 | 88.12 | 226.23 | 13.44 |
| 2009 | 0 | -4.59 | |
| 2008 | 0 | -2.63 | |
| 2007 | 0 | -5.18 | |
| 2006 | 3.71 | 4.43 | 3.11 |
| 2005 | 2.32 | 3.67 | 0.55 |
| 2004 | 1.8 | 2.35 | 1.42 |
| 2003 | 2.33 | 3.11 | 1.61 |
| 2002 | 3.06 | 3.39 | 2.34 |
| 2001 | 4.24 | 5.58 | 2.81 |
| 2000 | 9.74 | 11.9 | 6.63 |
| 1999 | 4.79 | 7.43 | 3.29 |
| 1998 | 7.19 | 9.35 | 4.43 |
| 1997 | 10.7 | 17.53 | 7.36 |