| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 16.73 | 20.48 | 13.7 |
| 2024 | 11.14 | 19.75 | 7.91 |
| 2023 | 11.02 | 14.85 | 8.99 |
| 2022 | 8.78 | 10.29 | 5.68 |
| 2021 | 8.82 | 12.57 | 7.31 |
| 2020 | 11.81 | 17.9 | 7.49 |
| 2019 | 8.34 | 11.67 | 6.24 |
| 2018 | 8.96 | 13.08 | 6.38 |
| 2017 | 10.63 | 15.17 | 7.65 |
| 2016 | 13.01 | 18.75 | 8 |
| 2015 | 8.15 | 16.6 | 4.34 |
| 2014 | 5.19 | 6.62 | 4.16 |
| 2013 | 3.75 | 5.49 | 2.96 |
| 2012 | 3.45 | 4.62 | 2.62 |