| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.94 | 8.62 | 4.12 |
| 2023 | 11.17 | 15.67 | 7.36 |
| 2022 | 12.82 | 15.65 | 9.75 |
| 2021 | 22.71 | 34.69 | 14.63 |
| 2020 | 18.85 | 32.82 | 11.02 |
| 2019 | 11.1 | 15.38 | 7.62 |
| 2018 | 10.67 | 13.05 | 8.08 |
| 2017 | 8.06 | 9.18 | 7.41 |
| 2016 | 9.56 | 11.31 | 7.93 |
| 2015 | 10.89 | 15.5 | 7.8 |
| 2014 | 7.73 | 9.46 | 6.43 |
| 2013 | 6.01 | 8.2 | 4.54 |
| 2012 | 6.09 | 8.45 | 4 |
| 2011 | 10.17 | 15.08 | 8.26 |
| 2010 | 14.37 | 16.95 | 12.15 |