| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 11.61 | 14.94 | 9.38 |
| 2024 | 9.33 | 14.94 | 5.22 |
| 2023 | 7.9 | 14.56 | 6.63 |
| 2022 | 8.41 | 12.16 | 6.77 |
| 2021 | 10.95 | 15.2 | 8.04 |
| 2020 | 20.01 | 31.26 | 13.95 |
| 2019 | 27.56 | 44.03 | 15.31 |
| 2018 | 1211.55 | 9498.94 | 29.2 |
| 2017 | 4335.22 | 9956.32 | 866.46 |
| 2016 | 399.16 | 1103.3 | 170.72 |
| 2015 | 317.46 | 828.17 | 85.41 |
| 2014 | 37.29 | 102.95 | 27.07 |
| 2013 | 44.36 | 64.05 | 35.68 |
| 2012 | 0 | -2.09 | |
| 2011 | 0 | -2.17 | |
| 2010 | 7.93 | 8.95 | 6.94 |
| 2009 | 5.65 | 8.09 | 4.34 |
| 2008 | 5.61 | 9.35 | 2.43 |
| 2007 | 5.65 | 8.97 | 1.83 |
| 2006 | 2 | 2.76 | 1.63 |
| 2005 | 2 | 2.89 | 1.34 |
| 2004 | 3.87 | 5.13 | 2.87 |
| 2003 | 5.59 | 6.76 | 3.8 |
| 2002 | 6.64 | 9.7 | 2.73 |
| 2001 | 5.72 | 7.45 | 4 |
| 2000 | 4.47 | 5.78 | 3.14 |
| 1999 | 2.28 | 2.65 | 1.87 |
| 1998 | 2.51 | 3.26 | 1.97 |
| 1997 | 3.13 | 5.61 | 2.17 |