| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.76 | 5.18 | 4.33 |
| 2024 | 4.98 | 6.88 | 3.74 |
| 2023 | 5.92 | 7.33 | 3.55 |
| 2022 | 3.09 | 4.08 | 2.06 |
| 2021 | 1.75 | 2.58 | 1.14 |
| 2020 | 1.24 | 1.42 | 1.07 |
| 2019 | 1.35 | 2.03 | 1.07 |
| 2018 | 2.63 | 3.65 | 1.44 |
| 2017 | 3.95 | 5.89 | 2.88 |
| 2016 | 3.78 | 6.45 | 2.22 |
| 2015 | 4.51 | 8.47 | 2.4 |
| 2014 | 4.21 | 8.48 | 3.19 |
| 2013 | 4.26 | 6 | 3.45 |
| 2012 | 5.5 | 7.05 | 3.84 |
| 2011 | 6.19 | 9.18 | 3.99 |
| 2010 | 7.36 | 9.84 | 5.11 |
| 2009 | 6.8 | 7.92 | 5.68 |
| 2008 | 0 | -1.54 | |
| 2007 | 14.79 | 17.6 | 10.44 |
| 2006 | 5.2 | 11.18 | 1.3 |
| 2005 | 1.84 | 2.48 | 1.41 |
| 2004 | 2.67 | 3.93 | 1.25 |
| 2003 | 3.48 | 4 | 3.02 |
| 2002 | 4.03 | 4.37 | 3.25 |
| 2001 | 4.93 | 6.14 | 3.13 |
| 2000 | 4.66 | 6.66 | 2.64 |
| 1999 | 3.9 | 4.91 | 3.2 |
| 1998 | 3.88 | 4.77 | 2.87 |