| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0 | -0.44 | |
| 2019 | 0 | -0.29 | |
| 2018 | 13.07 | 38.95 | 6.31 |
| 2017 | 37.31 | 43.14 | 30.44 |
| 2016 | 81.85 | 176.41 | 38.48 |
| 2015 | 537.93 | 1261.02 | 14.31 |
| 2014 | 14.98 | 17.69 | 8.51 |
| 2013 | 0 | -4.44 | |
| 2012 | 0 | -9.29 | |
| 2011 | 0 | -9.39 | |
| 2010 | 0 | -9.43 | |
| 2009 | 121.53 | 218.41 | 29.13 |
| 2008 | 29.44 | 35.87 | 21.15 |
| 2007 | 51.59 | 91.58 | 28.81 |
| 2006 | 24.15 | 31.5 | 16.52 |
| 2005 | 16.31 | 19.01 | 13 |
| 2004 | 18.54 | 25.09 | 13.43 |
| 2003 | 25.13 | 30.62 | 19.28 |
| 2002 | 28.16 | 35.54 | 15.34 |
| 2001 | 28.27 | 38.7 | 16.85 |
| 2000 | 80.04 | 116.68 | 42.85 |
| 1999 | 43.04 | 56.35 | 27.12 |
| 1998 | 41.56 | 62.65 | 31.17 |