| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.74 | 6.14 | 5.26 |
| 2024 | 6.04 | 6.83 | 5.33 |
| 2023 | 2.39 | 6.1 | 0.37 |
| 2022 | 2.99 | 3.57 | 2.53 |
| 2021 | 5.19 | 7.37 | 3.13 |
| 2020 | 5.44 | 7.48 | 3.8 |
| 2019 | 4.71 | 5.45 | 4.07 |
| 2018 | 7.5 | 19 | 4.09 |
| 2017 | 45.07 | 68.54 | 17.76 |
| 2016 | 58.26 | 67.96 | 38.02 |
| 2015 | 0 | -6.09 | |
| 2014 | 141.3 | 201.06 | 116.6 |
| 2013 | 67.55 | 163.08 | 33.7 |
| 2012 | 20.98 | 33.75 | 11.2 |
| 2011 | 19.62 | 37.63 | 10.96 |
| 2010 | 0 | -6.59 | |
| 2009 | 89.49 | 255.98 | 23.35 |
| 2008 | 43.1 | 97.36 | 20.44 |
| 2007 | 0 | -17.76 | |
| 2006 | 369.46 | 615.74 | 216.45 |
| 2005 | 5.24 | 9.84 | 1.18 |
| 2004 | 2.86 | 7.54 | 1.27 |
| 2003 | 10.62 | 34.89 | 2.24 |
| 2002 | 50.5 | 58.77 | 44.35 |
| 2001 | 5.09 | 8.91 | 2.73 |
| 2000 | 1.58 | 2.32 | 1.05 |
| 1999 | 2.4 | 9.65 | 0.46 |
| 1998 | 0.33 | 0.39 | 0.25 |
| 1997 | 0.43 | 0.56 | 0.26 |