| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.04 | 10.52 | 7.97 |
| 2024 | 6.66 | 10.15 | 2.71 |
| 2023 | 2.4 | 4.27 | 1.44 |
| 2022 | 3.05 | 4.38 | 2.51 |
| 2021 | 5.17 | 9.5 | 2.67 |
| 2020 | 14.22 | 29.15 | 7.02 |
| 2019 | 6.6 | 8.65 | 4.54 |
| 2018 | 7.44 | 9.39 | 4.81 |
| 2017 | 9.14 | 10.69 | 8.12 |
| 2016 | 12.96 | 18.47 | 10.11 |
| 2015 | 22.64 | 38.19 | 10.75 |
| 2014 | 11.07 | 16.17 | 7.04 |
| 2013 | 7.38 | 10.02 | 5.61 |
| 2012 | 6.35 | 8 | 4.79 |
| 2011 | 9.29 | 12.49 | 6.69 |
| 2010 | 11.35 | 13.6 | 8.47 |
| 2009 | 11.98 | 17.42 | 6.24 |
| 2008 | 8.25 | 13.61 | 4 |
| 2007 | 10.06 | 14.48 | 5.46 |
| 2006 | 5.52 | 7.3 | 4.29 |
| 2005 | 5.09 | 6.74 | 3.68 |