| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | -0.62 | |
| 2024 | 0 | -0.42 | |
| 2023 | 4.77 | 5.12 | 4.22 |
| 2022 | 4.6 | 4.88 | 4.17 |
| 2021 | 9.87 | 14.15 | 5.89 |
| 2020 | 17.7 | 28.68 | 12.18 |
| 2019 | 9.72 | 14.9 | 0.87 |
| 2018 | 6.51 | 24.37 | 0.86 |
| 2017 | 47.78 | 66.92 | 22.23 |
| 2016 | 0 | -4.33 | |
| 2015 | 186.61 | 307.68 | 62.08 |
| 2014 | 58.73 | 84.25 | 35.69 |
| 2013 | 33.45 | 54.48 | 11.05 |
| 2012 | 14.37 | 21.97 | 8.38 |
| 2011 | 29.59 | 30.49 | 26.25 |
| 2010 | 24.93 | 34.72 | 19.93 |
| 2009 | 12.15 | 24.71 | 5.41 |
| 2008 | 13.46 | 31.75 | 4.25 |
| 2007 | 31.57 | 44.15 | 22.32 |
| 2006 | 19.68 | 25.68 | 10.55 |
| 2005 | 6.07 | 11.31 | 3.27 |
| 2004 | 10.22 | 18.13 | 5.55 |
| 2003 | 20.52 | 24.62 | 14.83 |
| 2002 | 0 | -0.95 | |
| 2001 | 2.34 | 6.97 | 1.19 |
| 2000 | 0.83 | 1.12 | 0.64 |
| 1999 | 0.64 | 0.98 | 0.41 |
| 1998 | 0.84 | 1.16 | 0.48 |
| 1997 | 1.36 | 1.78 | 0.85 |