| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 6.37 | 6.69 | 5.94 |
| 2023 | 5.69 | 6.65 | 4.24 |
| 2022 | 4.43 | 5.42 | 3.82 |
| 2021 | 6.66 | 9.94 | 5.18 |
| 2020 | 7.73 | 9.38 | 5.29 |
| 2019 | 11.56 | 16.07 | 6.88 |
| 2018 | 10.85 | 14.28 | 8.46 |
| 2017 | 12.24 | 15.08 | 10.03 |
| 2016 | 6.85 | 12.01 | 4.41 |
| 2015 | 15.47 | 29.72 | 5.15 |
| 2014 | 13.63 | 30.18 | 9.48 |
| 2013 | 17.21 | 22.44 | 12.35 |
| 2012 | 13.09 | 16.73 | 8.4 |
| 2011 | 10.72 | 12.64 | 8.47 |
| 2010 | 10.89 | 12.72 | 9.95 |