| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.36 | 12.53 | 5.63 |
| 2024 | 5.97 | 16.68 | 2.57 |
| 2023 | 3.25 | 4.04 | 2.67 |
| 2022 | 3.03 | 6.32 | 1.47 |
| 2021 | 1.43 | 1.71 | 1.05 |
| 2020 | 1.73 | 2.39 | 1.31 |
| 2019 | 1.7 | 2.63 | 1.41 |
| 2018 | 2.61 | 5.21 | 1.46 |
| 2017 | 3.41 | 5.22 | 2.69 |
| 2016 | 2.89 | 4.1 | 2.13 |
| 2015 | 2.54 | 4 | 1.46 |
| 2014 | 1.36 | 1.79 | 1.09 |
| 2013 | 1.5 | 2.02 | 1.19 |
| 2012 | 1.88 | 2.74 | 1.38 |
| 2011 | 2.14 | 2.65 | 1.44 |
| 2010 | 3.05 | 4.31 | 2.38 |
| 2009 | 4.4 | 5.68 | 3.11 |
| 2008 | 0 | -4.42 | |
| 2007 | 0 | -0.59 | |
| 2006 | 0 | -0.27 | |
| 2005 | 1.11 | 1.31 | 0.66 |
| 2004 | 2.71 | 7.16 | 0.92 |
| 2003 | 6.01 | 7 | 4.93 |
| 2002 | 5.36 | 6.49 | 3.95 |
| 2001 | 7.11 | 8.93 | 5.18 |
| 2000 | 15.54 | 19.97 | 10.74 |
| 1999 | 10.48 | 13.33 | 7.98 |
| 1998 | 7.34 | 8.76 | 4.74 |