| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.34 | 6.64 | 6.17 |
| 2024 | 6.28 | 7.46 | 5.55 |
| 2023 | 7.95 | 9.39 | 6.19 |
| 2022 | 10.75 | 13.79 | 7.7 |
| 2021 | 13.56 | 19.18 | 9.42 |
| 2020 | 14.27 | 19.41 | 8.86 |
| 2019 | 10.66 | 13.06 | 8.8 |
| 2018 | 10.59 | 13.95 | 8.18 |
| 2017 | 7.99 | 10.53 | 6.08 |
| 2016 | 6.28 | 7.2 | 5.48 |
| 2015 | 6.97 | 11.05 | 5.03 |
| 2014 | 5.87 | 7.11 | 5.07 |
| 2013 | 5.92 | 8.56 | 4.57 |
| 2012 | 4.11 | 4.91 | 3.27 |
| 2011 | 4.13 | 4.99 | 3.45 |