| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.16 | 1.3 | 1.03 |
| 2024 | 1.06 | 1.41 | 0.9 |
| 2023 | 1.07 | 1.36 | 0.94 |
| 2022 | 1.08 | 1.39 | 0.93 |
| 2021 | 1.32 | 1.94 | 1.18 |
| 2020 | 1.62 | 1.98 | 1.25 |
| 2019 | 1.42 | 1.9 | 1.05 |
| 2018 | 1.19 | 1.5 | 0.87 |
| 2017 | 1.76 | 2.13 | 1.31 |
| 2016 | 2.38 | 2.95 | 2.1 |
| 2015 | 3.28 | 4.7 | 2.14 |
| 2014 | 2.01 | 4.05 | 1.57 |
| 2013 | 2.03 | 2.36 | 1.64 |
| 2012 | 2.13 | 2.91 | 1.6 |
| 2011 | 2.31 | 2.55 | 1.62 |
| 2010 | 5.53 | 8.62 | 2.44 |
| 2009 | 90.76 | 480.15 | 6.67 |
| 2008 | 0 | -21.23 | |
| 2007 | 12.66 | 17.25 | 7.72 |
| 2006 | 3.68 | 7.86 | 1.25 |
| 2005 | 1 | 1.48 | 0.62 |
| 2004 | 1.71 | 2.44 | 1.08 |
| 2003 | 2.07 | 2.82 | 1.53 |
| 2002 | 3.58 | 3.8 | 3.34 |