| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.93 | 6.49 | 3.62 |
| 2023 | 8.56 | 10.05 | 6.43 |
| 2022 | 10.14 | 14.2 | 6.7 |
| 2021 | 16.97 | 23.21 | 13.9 |
| 2020 | 14.1 | 19.55 | 8.95 |
| 2019 | 8.92 | 11.98 | 6.21 |
| 2018 | 8.85 | 11.27 | 6.4 |
| 2017 | 15.31 | 21.02 | 9.81 |
| 2016 | 18.51 | 23.05 | 13.24 |
| 2015 | 16.42 | 24.71 | 11.46 |
| 2014 | 14.95 | 19.09 | 11.11 |
| 2013 | 13.93 | 17.73 | 10.3 |