| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.15 | 3.78 | 2.53 |
| 2024 | 2.81 | 3.86 | 2.25 |
| 2023 | 4.36 | 5.83 | 3.26 |
| 2022 | 3.49 | 4.87 | 2.57 |
| 2021 | 4.62 | 5.68 | 3.4 |
| 2020 | 5.23 | 8.16 | 3.01 |
| 2019 | 3.23 | 3.87 | 2.72 |
| 2018 | 3.99 | 5.78 | 2.63 |
| 2017 | 6.29 | 8.61 | 4.78 |
| 2016 | 9.65 | 12.81 | 8.3 |
| 2015 | 11.76 | 23.94 | 5.37 |
| 2014 | 5.78 | 7.94 | 4.29 |
| 2013 | 5.34 | 7.86 | 3.69 |