| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.37 | 1.84 | 1.07 |
| 2024 | 1.27 | 1.84 | 0.83 |
| 2023 | 1.54 | 2.1 | 1.23 |
| 2022 | 1.56 | 2.84 | 0.7 |
| 2021 | 0.79 | 0.99 | 0.65 |
| 2020 | 1.06 | 1.24 | 0.9 |
| 2019 | 0.98 | 1.17 | 0.82 |
| 2018 | 0.98 | 1.27 | 0.79 |
| 2017 | 1.58 | 2.29 | 1.04 |
| 2016 | 82.94 | 106.84 | 71.76 |
| 2015 | 74.64 | 139.16 | 37.63 |
| 2014 | 172.18 | 284.07 | 68.53 |
| 2013 | 0 | -2.7 | |
| 2012 | 0 | -2.38 | |
| 2011 | 0 | -4.95 | |
| 2010 | 0 | -3.75 | |
| 2009 | 0 | -3.11 | |
| 2008 | 0 | -1.7 | |
| 2007 | 0 | -1.06 | |
| 2006 | 0 | -0.68 | |
| 2005 | 0 | -0.51 | |
| 2004 | 2.9 | 3.35 | 2.46 |
| 2003 | 2.57 | 2.78 | 2.34 |
| 2002 | 3556.68 | 6790.92 | 103.49 |
| 2001 | 8.04 | 10.16 | 5.68 |
| 2000 | 7.7 | 8.83 | 6.23 |
| 1999 | 6.13 | 9.26 | 4.56 |
| 1998 | 4.97 | 7.41 | 3.66 |
| 1997 | 4.28 | 6.19 | 2.75 |