| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.65 | 5.88 | 3.32 |
| 2023 | 5.93 | 7.65 | 4.63 |
| 2022 | 4.69 | 6.37 | 3.42 |
| 2021 | 7.84 | 11.12 | 5.58 |
| 2020 | 11.98 | 14.82 | 8.79 |
| 2019 | 9.98 | 12.54 | 7.81 |
| 2018 | 8.52 | 11.45 | 6.21 |
| 2017 | 9.71 | 11.67 | 7.62 |
| 2016 | 12.71 | 16.37 | 10.29 |
| 2015 | 18.28 | 37.13 | 10.5 |
| 2014 | 8.65 | 11.1 | 6.19 |
| 2013 | 5.73 | 7.98 | 3.51 |
| 2012 | 6.88 | 9.89 | 4.18 |
| 2011 | 9.96 | 11.45 | 8.08 |