| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.65 | 1.72 | 1.5 |
| 2024 | 1.73 | 1.95 | 1.5 |
| 2023 | 1.99 | 2.29 | 1.74 |
| 2022 | 2.28 | 3.06 | 1.86 |
| 2021 | 3.07 | 3.84 | 2.66 |
| 2020 | 0 | -3.31 | |
| 2019 | 96.96 | 116.89 | 83.4 |
| 2018 | 33.4 | 112.52 | 10.77 |
| 2017 | 10.1 | 17.51 | 4.99 |
| 2016 | 9.72 | 16.95 | 5.55 |
| 2015 | 10.45 | 20.7 | 3.75 |
| 2014 | 2.48 | 4.89 | 1.44 |
| 2013 | 1.87 | 2.41 | 1.49 |
| 2012 | 2.64 | 3.47 | 1.53 |
| 2011 | 3.34 | 3.94 | 2.29 |
| 2010 | 4.08 | 5.56 | 2.78 |
| 2009 | 3.49 | 5.68 | 1.95 |
| 2008 | 3.19 | 8.73 | 1.16 |
| 2007 | 5.61 | 8.5 | 2.89 |
| 2006 | 2.58 | 3.55 | 1.87 |
| 2005 | 1.77 | 2.58 | 1.23 |
| 2004 | 3.61 | 6.18 | 1.59 |
| 2003 | 5.99 | 7.36 | 4.66 |
| 2002 | 2.73 | 3.41 | 1.81 |
| 2001 | 2.73 | 3.14 | 2.11 |
| 2000 | 2.83 | 3.48 | 2.37 |