| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.46 | 4.93 | 3.9 |
| 2024 | 4.26 | 6.23 | 2.86 |
| 2023 | 5.6 | 7.91 | 3.69 |
| 2022 | 7.22 | 9.24 | 5.44 |
| 2021 | 4.77 | 7.37 | 3.92 |
| 2020 | 8.81 | 12.99 | 4.75 |
| 2019 | 5.54 | 7.23 | 4.78 |
| 2018 | 5.58 | 6.08 | 5 |
| 2017 | 5.79 | 7.24 | 4.26 |
| 2016 | 6.61 | 8.29 | 5.07 |
| 2015 | 12.21 | 15.89 | 6.68 |
| 2014 | 6.93 | 9.24 | 5.38 |
| 2013 | 9.37 | 12.87 | 7.23 |
| 2012 | 0 | ||
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 0 | ||
| 2007 | 0 | -0.54 | |
| 2006 | 1.67 | 2.18 | 1.03 |
| 2005 | 1.6 | 2.22 | 0.91 |
| 2004 | 2.3 | 3.4 | 1.67 |
| 2003 | 2.79 | 3.22 | 1.98 |
| 2002 | 3.42 | 3.8 | 2.92 |
| 2001 | 6.7 | 12.09 | 3.22 |
| 2000 | 8.01 | 10.26 | 4.86 |
| 1999 | 5.31 | 7.96 | 2.63 |
| 1998 | 6.09 | 8.81 | 4.17 |