| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.68 | 9.01 | 6.36 |
| 2024 | 5.34 | 10.97 | 3.03 |
| 2023 | 4.53 | 7.1 | 3.76 |
| 2022 | 3.21 | 4.69 | 2.09 |
| 2021 | 2.18 | 2.81 | 1.72 |
| 2020 | 3.27 | 4.64 | 2.32 |
| 2019 | 3.99 | 5.81 | 3.07 |
| 2018 | 4.57 | 7.48 | 3.22 |
| 2017 | 7.81 | 10.74 | 5.87 |
| 2016 | 13.14 | 18.39 | 10.44 |
| 2015 | 22.3 | 51.42 | 6.16 |
| 2014 | 3.95 | 9.67 | 2.38 |
| 2013 | 3.81 | 4.83 | 3.17 |