| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9 | 10.1 | 7.79 |
| 2024 | 8.93 | 11.67 | 6.65 |
| 2023 | 14.71 | 18.09 | 11.24 |
| 2022 | 27.91 | 71.56 | 11.32 |
| 2021 | 22.54 | 67.52 | 10.35 |
| 2020 | 23.95 | 47.66 | 8.76 |
| 2019 | 4.74 | 11.01 | 2.18 |
| 2018 | 3.34 | 4.36 | 1.97 |
| 2017 | 2.79 | 3.4 | 2.17 |
| 2016 | 3.44 | 6.2 | 2.12 |
| 2015 | 4.49 | 7.74 | 2.03 |
| 2014 | 2.36 | 4.22 | 1.49 |
| 2013 | 1.7 | 2.09 | 1.26 |
| 2012 | 1.87 | 3.1 | 1.21 |
| 2011 | 1.74 | 2.69 | 0.86 |
| 2010 | 1.3 | 2.49 | 0.89 |
| 2009 | 2.46 | 3.44 | 1.32 |
| 2008 | 2.62 | 5.28 | 1.01 |
| 2007 | 13.87 | 30.61 | 4.4 |
| 2006 | 3.24 | 8.22 | 1.36 |
| 2005 | 1.82 | 2.5 | 1.31 |
| 2004 | 2.61 | 5.04 | 1.56 |
| 2003 | 0 | 0 | |
| 2002 | 9.22 | 10.88 | 7.45 |