| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.38 | 3.79 | 2.88 |
| 2024 | 3.24 | 4.86 | 2.24 |
| 2023 | 3.06 | 5.27 | 1.44 |
| 2022 | 1.45 | 1.93 | 0.93 |
| 2021 | 0.89 | 1.55 | 0.48 |
| 2020 | 0.95 | 1.49 | 0.56 |
| 2019 | 1.2 | 1.65 | 0.89 |
| 2018 | 1.72 | 2.97 | 1.19 |
| 2017 | 5.63 | 12.33 | 1.97 |
| 2016 | 33.09 | 71.83 | 11.68 |
| 2015 | 11.34 | 34.88 | 6.59 |
| 2014 | 4.56 | 7.63 | 2.5 |
| 2013 | 2.34 | 2.94 | 1.61 |
| 2012 | 1.41 | 1.72 | 1.09 |
| 2011 | 2.15 | 2.69 | 1.17 |
| 2010 | 2.39 | 3.4 | 1.6 |
| 2009 | 2.44 | 4.03 | 0.99 |
| 2008 | 1.61 | 2.79 | 0.76 |
| 2007 | 2.62 | 4.44 | 1.54 |
| 2006 | 1.93 | 2.71 | 1.3 |
| 2005 | 4.24 | 8.46 | 1.1 |
| 2004 | 11 | 15.57 | 6.7 |