| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.24 | 1.41 | 1.09 |
| 2024 | 1.17 | 1.31 | 0.91 |
| 2023 | 1.24 | 1.46 | 1.09 |
| 2022 | 1.33 | 1.81 | 1.07 |
| 2021 | 1.71 | 2.13 | 1.31 |
| 2020 | 1.79 | 2.39 | 1.19 |
| 2019 | 1.34 | 1.77 | 1.08 |
| 2018 | 1.48 | 1.91 | 1.03 |
| 2017 | 2.1 | 2.31 | 1.82 |
| 2016 | 2.14 | 2.62 | 1.82 |
| 2015 | 3.15 | 4.82 | 2.03 |
| 2014 | 2.34 | 2.77 | 1.95 |
| 2013 | 2.49 | 3.37 | 2.09 |
| 2012 | 2167.82 | 4058.92 | 816.47 |
| 2011 | 1393.81 | 1938.16 | 844.45 |
| 2010 | 0 | -1.14 | |
| 2009 | 0 | -0.36 | |
| 2008 | 0 | -0.37 | |
| 2007 | 0 | -0.5 | |
| 2006 | 0 | -0.24 | |
| 2005 | 0 | -0.15 | |
| 2004 | 0 | -0.24 | |
| 2003 | 0 | -0.47 | |
| 2002 | 110.93 | 132.85 | 90.63 |
| 2001 | 131.84 | 164.38 | 97.91 |
| 2000 | 165.97 | 216.54 | 118.81 |
| 1999 | 336.34 | 750.01 | 17.32 |
| 1998 | 3.26 | 4.18 | 2.38 |
| 1997 | 3.12 | 4.13 | 2.02 |