| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.38 | 0.4 | 0.36 |
| 2024 | 0.41 | 0.51 | 0.32 |
| 2023 | 0.66 | 0.89 | 0.47 |
| 2022 | 1.08 | 1.6 | 0.72 |
| 2021 | 1.19 | 1.65 | 0.85 |
| 2020 | 1.1 | 1.38 | 0.85 |
| 2019 | 1.2 | 1.64 | 0.94 |
| 2018 | 1.48 | 2.08 | 1 |
| 2017 | 2.47 | 3.12 | 1.84 |
| 2016 | 2.47 | 3.44 | 2.08 |
| 2015 | 3.09 | 5.71 | 2.11 |
| 2014 | 1.98 | 2.16 | 1.69 |
| 2013 | 794.11 | 4584.67 | 1.99 |
| 2012 | 0 | ||
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 0 | -1.99 | |
| 2007 | 56.97 | 168.02 | 2.06 |
| 2006 | 1.95 | 2.5 | 1.26 |
| 2005 | 1.96 | 3.01 | 1.31 |
| 2004 | 4.12 | 5.81 | 2.64 |
| 2003 | 4.08 | 4.54 | 3.31 |
| 2002 | 4.07 | 5.4 | 2.18 |
| 2001 | 4.98 | 7.04 | 3.58 |
| 2000 | 3.73 | 4.62 | 2.65 |
| 1999 | 3.26 | 4.04 | 2.68 |
| 1998 | 3.31 | 4.52 | 1.82 |