| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.14 | 1.24 | 1.01 |
| 2024 | 0.95 | 1.2 | 0.77 |
| 2023 | 1.14 | 1.29 | 0.98 |
| 2022 | 1.39 | 1.78 | 1.14 |
| 2021 | 1.35 | 2.37 | 1.09 |
| 2020 | 1.33 | 1.59 | 1.17 |
| 2019 | 5.67 | 25.89 | 1.4 |
| 2018 | 6076.27 | 9763.41 | 19.42 |
| 2017 | 1897.21 | 12356.6 | 11.52 |
| 2016 | 8.61 | 26.51 | 4.02 |
| 2015 | 5.23 | 10.16 | 2.58 |
| 2014 | 1.7 | 2.87 | 1.19 |
| 2013 | 1.26 | 1.54 | 1.05 |
| 2012 | 1.49 | 1.99 | 1.08 |
| 2011 | 1.84 | 2.17 | 1.5 |
| 2010 | 2.01 | 2.71 | 1.45 |
| 2009 | 2.48 | 3.01 | 1.98 |
| 2008 | 4.01 | 6.45 | 1.44 |
| 2007 | 4.21 | 6.37 | 2.23 |
| 2006 | 2.09 | 2.81 | 1.49 |
| 2005 | 2.06 | 2.4 | 1.76 |
| 2004 | 2.49 | 4.17 | 1.86 |
| 2003 | 3.59 | 3.98 | 3.13 |
| 2002 | 3.6 | 4.16 | 2.75 |
| 2001 | 4.05 | 4.85 | 3.11 |
| 2000 | 4.36 | 5.21 | 3.68 |