| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.82 | 5.48 | 4.14 |
| 2024 | 2.79 | 6.2 | 1.74 |
| 2023 | 2.82 | 3.34 | 2.48 |
| 2022 | 3.2 | 4.01 | 2.49 |
| 2021 | 2.77 | 4.87 | 2.34 |
| 2020 | 2.87 | 3.53 | 2.32 |
| 2019 | 2.98 | 4.96 | 1.88 |
| 2018 | 2.6 | 3.62 | 1.82 |
| 2017 | 3.83 | 5.01 | 3.18 |
| 2016 | 5.45 | 9.88 | 3.57 |
| 2015 | 5.89 | 9.73 | 3.61 |
| 2014 | 10.22 | 18.39 | 4.58 |
| 2013 | 7.28 | 8.25 | 6.3 |
| 2012 | 9.78 | 13.38 | 5.4 |
| 2011 | 18.93 | 27.03 | 9.37 |
| 2010 | 12.59 | 29.62 | 6.81 |
| 2009 | 7.15 | 12.63 | 1.94 |
| 2008 | 3.33 | 6.31 | 1.55 |
| 2007 | 4.37 | 8.21 | 0.98 |
| 2006 | 1.01 | 1.18 | 0.79 |
| 2005 | 1.25 | 1.93 | 0.88 |
| 2004 | 2.03 | 2.49 | 1.43 |
| 2003 | 2.53 | 3.13 | 2 |
| 2002 | 2.96 | 3.46 | 2.14 |
| 2001 | 3.64 | 4.33 | 2.54 |
| 2000 | 4.47 | 5.75 | 2.9 |
| 1999 | 3.75 | 4.65 | 2.27 |
| 1998 | 4.47 | 6.55 | 2.99 |