| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 1.67 | 1.89 | 1.49 |
| 2025 | 1.55 | 2.13 | 1.33 |
| 2024 | 1.4 | 1.73 | 1.09 |
| 2023 | 1.81 | 2.15 | 1.54 |
| 2022 | 2.15 | 3.27 | 1.68 |
| 2021 | 1.97 | 2.66 | 1.69 |
| 2020 | 2.4 | 4.03 | 1.43 |
| 2019 | 1.84 | 2.3 | 1.46 |
| 2018 | 2.46 | 4.18 | 1.65 |
| 2017 | 41.99 | 62.35 | 2.53 |
| 2016 | 0 | -12.69 | |
| 2015 | 7060.93 | 12122.7 | 306.26 |
| 2014 | 1241.05 | 7564.96 | 10.73 |
| 2013 | 7.44 | 11.19 | 3.96 |
| 2012 | 3.5 | 4.21 | 2.75 |
| 2011 | 4.46 | 5.83 | 2.84 |
| 2010 | 4.56 | 6.72 | 3.02 |
| 2009 | 9.02 | 23.57 | 2.7 |
| 2008 | 27.61 | 47.76 | 7.08 |
| 2007 | 21.61 | 37.4 | 6.1 |
| 2006 | 9.28 | 17.88 | 4.43 |
| 2005 | 3.14 | 4.54 | 2.19 |
| 2004 | 3.76 | 5.72 | 2.31 |
| 2003 | 5.48 | 7 | 4.03 |
| 2002 | 5.94 | 8.31 | 2.87 |
| 2001 | 7.34 | 9.01 | 5.13 |
| 2000 | 8.96 | 11.68 | 5.36 |
| 1999 | 6.33 | 8.45 | 4.07 |
| 1998 | 3.78 | 5.17 | 2.78 |
| 1997 | 4.04 | 5.64 | 2.67 |