| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.9 | 2.44 | 1.51 |
| 2024 | 1.34 | 3.17 | 0.94 |
| 2023 | 1.64 | 1.87 | 1.41 |
| 2022 | 1.75 | 2.11 | 1.45 |
| 2021 | 2.17 | 3.28 | 1.73 |
| 2020 | 22.68 | 56.07 | 2.35 |
| 2019 | 68.69 | 281.59 | 23.29 |
| 2018 | 99.79 | 245.26 | 37.67 |
| 2017 | 80.91 | 157.07 | 42.69 |
| 2016 | 76.27 | 136.63 | 35.96 |
| 2015 | 79.92 | 166.17 | 32.8 |
| 2014 | 63.67 | 116.26 | 41.53 |
| 2013 | 48.81 | 59.52 | 40.41 |
| 2012 | 110.11 | 418.02 | 23.92 |
| 2011 | 32.75 | 43.56 | 24 |
| 2010 | 27.33 | 39.7 | 14.04 |
| 2009 | 12.8 | 28.83 | 8.07 |
| 2008 | 19.82 | 38.9 | 10.06 |
| 2007 | 27.91 | 51.19 | 5.49 |
| 2006 | 3.23 | 6.34 | 1.84 |
| 2005 | 2.39 | 3.14 | 1.8 |
| 2004 | 4.3 | 6.2 | 2.93 |
| 2003 | 4.44 | 4.94 | 3.06 |
| 2002 | 3.94 | 4.79 | 3.26 |
| 2001 | 6.4 | 8.6 | 3.55 |
| 2000 | 8.68 | 11.15 | 5.85 |
| 1999 | 7.32 | 10.49 | 5.14 |
| 1998 | 8.47 | 10.7 | 6.82 |
| 1997 | 8.38 | 15.33 | 5.32 |