| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.36 | 6.61 | 4.16 |
| 2024 | 4.04 | 7.17 | 2.94 |
| 2023 | 4.52 | 5.23 | 3.48 |
| 2022 | 3.69 | 4.69 | 3.12 |
| 2021 | 3.75 | 5.11 | 2.62 |
| 2020 | 4.77 | 6.64 | 3.26 |
| 2019 | 3.83 | 5.27 | 2.19 |
| 2018 | 2.69 | 4.16 | 1.97 |
| 2017 | 5.89 | 13.76 | 2.66 |
| 2016 | 12.28 | 21.48 | 9.84 |
| 2015 | 16.15 | 27.96 | 9.03 |
| 2014 | 9.08 | 12.46 | 6.16 |
| 2013 | 5.81 | 6.81 | 4.06 |