| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.51 | 5.93 | 5.32 |
| 2024 | 6.49 | 8.28 | 5.04 |
| 2023 | 8.83 | 11.51 | 6.66 |
| 2022 | 7 | 9.19 | 5.14 |
| 2021 | 5.31 | 10.86 | 2.89 |
| 2020 | 3.03 | 3.53 | 2.39 |
| 2019 | 4.06 | 5.68 | 2.84 |
| 2018 | 7.72 | 11.26 | 4.79 |
| 2017 | 9.53 | 18.92 | 7.18 |
| 2016 | 11.65 | 15.53 | 9.15 |
| 2015 | 98.29 | 183.01 | 10.73 |
| 2014 | 124.85 | 154.12 | 102.79 |
| 2013 | 185.55 | 372.73 | 108.05 |
| 2012 | 0 | -2.15 | |
| 2011 | 0 | -1.37 | |
| 2010 | 0 | -1.06 | |
| 2009 | 0 | -0.92 | |
| 2008 | 11.84 | 17.7 | 5.4 |
| 2007 | 8.73 | 18.59 | 3.1 |
| 2006 | 3.29 | 5.02 | 1.96 |
| 2005 | 2.15 | 2.65 | 1.58 |
| 2004 | 3.6 | 5.1 | 2.51 |
| 2003 | 4.85 | 6.08 | 3.43 |
| 2002 | 7.37 | 8.76 | 6.26 |
| 2001 | 10.38 | 12.45 | 8.08 |
| 2000 | 13.43 | 15.76 | 9.34 |
| 1999 | 7.68 | 11.28 | 5.05 |
| 1998 | 5.64 | 7.06 | 4.6 |
| 1997 | 5.97 | 8.74 | 3.95 |