| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.69 | 16.74 | 12.34 |
| 2024 | 12.21 | 19.33 | 9.7 |
| 2023 | 13.58 | 20.15 | 9.67 |
| 2022 | 11.3 | 14.81 | 8.94 |
| 2021 | 11.82 | 17.13 | 6.64 |
| 2020 | 7.95 | 12.4 | 5.52 |
| 2019 | 6.65 | 9.41 | 5.3 |
| 2018 | 8.03 | 12.25 | 5.61 |
| 2017 | 12.82 | 20.15 | 8.4 |
| 2016 | 15.26 | 50.29 | 7.88 |
| 2015 | 8.09 | 9.63 | 4.47 |
| 2014 | 7.62 | 15.65 | 4.42 |
| 2013 | 14.29 | 17.96 | 12.2 |
| 2012 | 11.65 | 13.79 | 8.87 |
| 2011 | 15.8 | 21.17 | 9.3 |
| 2010 | 14.38 | 24.47 | 9.05 |
| 2009 | 5.6 | 9.05 | 2.75 |
| 2008 | 5.24 | 9.77 | 2.05 |
| 2007 | 7.19 | 12.11 | 2.97 |
| 2006 | 2.57 | 3.29 | 1.84 |
| 2005 | 1.92 | 3.1 | 1.49 |
| 2004 | 2.92 | 4 | 2 |