| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.77 | 11.06 | 7.16 |
| 2024 | 4.43 | 15.65 | 2.06 |
| 2023 | 2.08 | 4.4 | 1.16 |
| 2022 | 1.14 | 1.43 | 0.88 |
| 2021 | 1.36 | 1.64 | 1.08 |
| 2020 | 1.12 | 1.76 | 0.75 |
| 2019 | 0.99 | 1.52 | 0.39 |
| 2018 | 0.69 | 1.06 | 0.4 |
| 2017 | 1.32 | 2.09 | 1.01 |
| 2016 | 3.62 | 8.28 | 1.8 |
| 2015 | 4.64 | 7.2 | 2.74 |
| 2014 | 6.34 | 8.65 | 4.04 |
| 2013 | 6.93 | 9.12 | 5.09 |
| 2012 | 5.16 | 6.21 | 3.5 |
| 2011 | 6.05 | 8.54 | 3.7 |
| 2010 | 85.24 | 439.29 | 5.2 |
| 2009 | 39.8 | 64.68 | 12.71 |
| 2008 | 14.28 | 15.75 | 12.71 |
| 2007 | 28.18 | 75.83 | 9.96 |
| 2006 | 0 | -23.59 | |
| 2005 | 0 | -16.15 | |
| 2004 | 0 | -14.76 | |
| 2003 | 39.64 | 43 | 34.37 |
| 2002 | 99.45 | 167.99 | 33.31 |
| 2001 | 0 | -15.7 | |
| 2000 | 3561.33 | 7471.19 | 72.07 |
| 1999 | 13.77 | 19.15 | 9.01 |
| 1998 | 4.24 | 5.2 | 2.7 |
| 1997 | 3.47 | 5.02 | 2.61 |