| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | -5.78 | |
| 2021 | 0 | -3.65 | |
| 2020 | 5.55 | 8.93 | 3.17 |
| 2019 | 4.29 | 9.34 | 1.26 |
| 2018 | 4.24 | 7.9 | 1.61 |
| 2017 | 4.43 | 4.83 | 3.42 |
| 2016 | 4.65 | 6.04 | 3.77 |
| 2015 | 693.59 | 3213.96 | 3.53 |
| 2014 | 297.66 | 444.22 | 199.06 |
| 2013 | 277.99 | 490.57 | 130.37 |
| 2012 | 322.4 | 511.01 | 179.63 |
| 2011 | 0 | -84.29 | |
| 2010 | 54.32 | 65.81 | 46.29 |
| 2009 | 33.17 | 56.17 | 6.71 |
| 2008 | 10.7 | 18.56 | 5.03 |
| 2007 | 12.77 | 20.04 | 4.88 |
| 2006 | 3.67 | 5.89 | 1.59 |
| 2005 | 1.88 | 2.54 | 1.39 |
| 2004 | 3.07 | 4.36 | 2.3 |
| 2003 | 3.79 | 4.8 | 2.89 |
| 2002 | 6.01 | 7.52 | 4.95 |
| 2001 | 9.13 | 10.76 | 6.55 |
| 2000 | 10.79 | 15.64 | 7.05 |
| 1999 | 6.54 | 9.11 | 4.36 |
| 1998 | 5.99 | 7.18 | 5 |