| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | -5.7 | |
| 2024 | 4.32 | 13.69 | 1.07 |
| 2023 | 1.09 | 2.14 | 0.63 |
| 2022 | 0.7 | 0.88 | 0.51 |
| 2021 | 0.85 | 1.41 | 0.56 |
| 2020 | 0.89 | 1.91 | 0.67 |
| 2019 | 2.16 | 3.94 | 1.02 |
| 2018 | 3.44 | 4.82 | 2.54 |
| 2017 | 5 | 5.65 | 4.47 |
| 2016 | 6.9 | 9.42 | 4.58 |
| 2015 | 8.06 | 13.79 | 5.08 |
| 2014 | 5.25 | 8.31 | 3.67 |
| 2013 | 0 | -1.82 | |
| 2012 | 0 | -1.71 | |
| 2011 | 0 | -8.08 | |
| 2010 | 38.36 | 72.72 | 21.41 |
| 2009 | 34.44 | 59.93 | 2.29 |
| 2008 | 3.37 | 8.12 | 1.45 |
| 2007 | 5.01 | 7.88 | 1.54 |
| 2006 | 1.55 | 2.18 | 0.95 |
| 2005 | 1.09 | 1.54 | 0.79 |
| 2004 | 2.16 | 3.13 | 1.28 |
| 2003 | 3.19 | 4.36 | 2.14 |