| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0 | -0.04 | |
| 2019 | 0 | -0.04 | |
| 2018 | 9.35 | 11.11 | 3.5 |
| 2017 | 11.63 | 15.55 | 7.71 |
| 2016 | 18.6 | 30.17 | 11.64 |
| 2015 | 48.94 | 127.21 | 15 |
| 2014 | 14.85 | 22.72 | 9.51 |
| 2013 | 21.54 | 31.22 | 13.71 |
| 2012 | 14.96 | 19.32 | 10.42 |
| 2011 | 40.38 | 111.85 | 13.04 |
| 2010 | 39.84 | 111.3 | 17.44 |
| 2009 | 33.13 | 55.36 | 13.67 |
| 2008 | 26.33 | 53.84 | 11.96 |
| 2007 | 56.33 | 306.25 | 20.97 |
| 2006 | 109.64 | 235.06 | 54.82 |
| 2005 | 55.18 | 69.38 | 42.72 |
| 2004 | 0 | -8.47 | |
| 2003 | 0 | -12.06 | |
| 2002 | 330.14 | 372.69 | 273.46 |
| 2001 | 62.26 | 77.88 | 47.47 |