| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.08 | 12.5 | 9.25 |
| 2024 | 8.89 | 11.99 | 7.09 |
| 2023 | 7.89 | 10.46 | 4.56 |
| 2022 | 4.74 | 6.65 | 3.72 |
| 2021 | 9.83 | 19.54 | 5.6 |
| 2020 | 28.94 | 105.43 | 5.59 |
| 2019 | 6.64 | 11.51 | 4.84 |
| 2018 | 7.71 | 11.61 | 5.2 |
| 2017 | 13.99 | 20.33 | 9.41 |
| 2016 | 13.91 | 19.01 | 10.33 |
| 2015 | 10.76 | 20.19 | 2.9 |
| 2014 | 3.59 | 5.75 | 2.57 |
| 2013 | 6.35 | 8.52 | 5.15 |
| 2012 | 7.04 | 10.72 | 4.58 |
| 2011 | 8.19 | 11.66 | 4.92 |
| 2010 | 8.29 | 14.48 | 5.3 |
| 2009 | 5.22 | 8.25 | 1.89 |
| 2008 | 3.09 | 7.49 | 1.44 |
| 2007 | 7.35 | 11.42 | 4.6 |
| 2006 | 4.3 | 6.12 | 2.93 |
| 2005 | 2.61 | 3.3 | 1.61 |
| 2004 | 3.01 | 5.53 | 1.68 |