| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0 | -0.07 | |
| 2019 | 0 | -0.05 | |
| 2018 | 7.42 | 10.65 | 4.76 |
| 2017 | 12.06 | 16.42 | 8.35 |
| 2016 | 19.16 | 32.21 | 11.43 |
| 2015 | 385.02 | 1664.72 | 18.84 |
| 2014 | 82.69 | 140.66 | 49.96 |
| 2013 | 113.28 | 120.32 | 103.07 |
| 2012 | 0 | -20.8 | |
| 2011 | 83.9 | 147.99 | 26.69 |
| 2010 | 39.21 | 53.85 | 28.14 |
| 2009 | 0 | -2.96 | |
| 2008 | 0 | -1.73 | |
| 2007 | 70.61 | 132.14 | 20.93 |
| 2006 | 0 | -7.24 | |
| 2005 | 159.32 | 174.54 | 144.02 |
| 2004 | 85.14 | 175.55 | 61.99 |
| 2003 | 108.62 | 223.53 | 66.82 |
| 2002 | 960.32 | 2169.51 | 242.07 |
| 2001 | 74.39 | 159.99 | 15.19 |
| 2000 | 5.94 | 8.37 | 4.05 |
| 1999 | 11.88 | 35.94 | 6.17 |
| 1998 | 0 | -1.2 | |
| 1997 | 41.36 | 52.97 | 28.74 |