| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.31 | 6.16 | 4.29 |
| 2024 | 5.8 | 7.99 | 4.46 |
| 2023 | 7.03 | 10.54 | 4.19 |
| 2022 | 4.65 | 8.95 | 2.29 |
| 2021 | 3.3 | 4.21 | 2.82 |
| 2020 | 2.83 | 3.45 | 2.18 |
| 2019 | 2.95 | 4.16 | 2.15 |
| 2018 | 2.95 | 4.66 | 1.78 |
| 2017 | 6.09 | 8.44 | 4.33 |
| 2016 | 7.02 | 11.11 | 4.17 |
| 2015 | 9.57 | 12.75 | 5.87 |
| 2014 | 8.19 | 11.01 | 6.81 |
| 2013 | 6.64 | 8.98 | 5.2 |