| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.19 | 7.84 | 3.99 |
| 2024 | 5.25 | 8.38 | 3.83 |
| 2023 | 5.72 | 9.16 | 4.67 |
| 2022 | 5.76 | 6.96 | 4.66 |
| 2021 | 6.23 | 8.88 | 5.05 |
| 2020 | 8.2 | 13.58 | 5.92 |
| 2019 | 6.13 | 8.36 | 4.26 |
| 2018 | 7.73 | 11.05 | 4.79 |
| 2017 | 12.51 | 15.55 | 10.09 |
| 2016 | 11.87 | 16.24 | 9.8 |
| 2015 | 9.11 | 11.77 | 6.33 |
| 2014 | 5.93 | 10.21 | 4.23 |
| 2013 | 5.18 | 6.74 | 4.32 |
| 2012 | 6.29 | 8.23 | 4.72 |
| 2011 | 10.08 | 13.6 | 5.33 |
| 2010 | 8.06 | 11.96 | 5.53 |
| 2009 | 5.19 | 7.11 | 2.73 |
| 2008 | 4.65 | 7.25 | 2.18 |
| 2007 | 5.53 | 10.53 | 2.29 |
| 2006 | 1.95 | 2.57 | 1.34 |
| 2005 | 1.61 | 2.34 | 1.15 |
| 2004 | 3.17 | 4.39 | 2.18 |
| 2003 | 4.16 | 4.8 | 3.76 |
| 2002 | 6.62 | 15.01 | 3.55 |
| 2001 | 10.54 | 12.43 | 8.41 |
| 2000 | 9.44 | 13.46 | 5 |
| 1999 | 7.79 | 8.58 | 6.11 |
| 1998 | 6.76 | 10.1 | 4.93 |
| 1997 | 6.39 | 9.13 | 4.56 |