| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 12.75 | 12.94 | 12.49 |
| 2024 | 12.55 | 15.58 | 9.79 |
| 2023 | 15.86 | 19.8 | 13.6 |
| 2022 | 13.19 | 21.51 | 9.88 |
| 2021 | 13.37 | 15.38 | 11.92 |
| 2020 | 18.03 | 22.5 | 13.05 |
| 2019 | 11.45 | 17.81 | 5.43 |
| 2018 | 5.56 | 7.4 | 3.96 |
| 2017 | 7.82 | 10.75 | 6.04 |
| 2016 | 14.44 | 22.71 | 8.86 |
| 2015 | 25.73 | 52.8 | 14.2 |
| 2014 | 12.09 | 18.23 | 7.39 |
| 2013 | 7.18 | 8.89 | 4.85 |
| 2012 | 5.56 | 7.87 | 4.22 |
| 2011 | 8.02 | 10.79 | 5.89 |
| 2010 | 8.38 | 10.41 | 6.97 |
| 2009 | 7.4 | 9 | 5.84 |
| 2008 | 13.37 | 30.81 | 4.29 |
| 2007 | 21.51 | 35.95 | 7.72 |