| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 41.48 | 48.05 | 32.94 |
| 2024 | 28.44 | 36.81 | 22.14 |
| 2023 | 14.58 | 35.95 | 2.33 |
| 2022 | 15.44 | 17.99 | 13.15 |
| 2021 | 15.91 | 19.34 | 13.7 |
| 2020 | 21.29 | 24.45 | 18.26 |
| 2019 | 21.31 | 24.42 | 16.83 |
| 2018 | 21.1 | 34.8 | 15.8 |
| 2017 | 25.41 | 37.34 | 20.38 |
| 2016 | 41.38 | 68.22 | 21.58 |
| 2015 | 47.8 | 72.85 | 30.41 |
| 2014 | 30.84 | 38.51 | 26.52 |
| 2013 | 31.09 | 43.41 | 23.87 |
| 2012 | 24.28 | 34.83 | 16.04 |
| 2011 | 18.3 | 30.93 | 11.23 |
| 2010 | 24.35 | 87.54 | 11.31 |
| 2009 | 0 | -2.42 | |
| 2008 | 553.31 | 1342.42 | 231.88 |
| 2007 | 227.79 | 509.73 | 8.33 |
| 2006 | 122.02 | 256.93 | 7.48 |
| 2005 | 0.67 | 0.79 | 0.42 |
| 2004 | 1.06 | 1.65 | 0.69 |
| 2003 | 1.44 | 1.67 | 1.27 |
| 2002 | 1.06 | 1.57 | 0.66 |
| 2001 | 0.67 | 0.92 | 0.35 |
| 2000 | 0.31 | 0.41 | 0.2 |
| 1999 | 0.27 | 0.75 | 0.12 |
| 1998 | 0.15 | 0.22 | 0.09 |
| 1997 | 1.72 | 2.55 | 1.26 |