| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.21 | 6.79 | 5.09 |
| 2024 | 5.75 | 8.38 | 3.81 |
| 2023 | 5.01 | 7.43 | 3.46 |
| 2022 | 3.55 | 5.1 | 2.48 |
| 2021 | 3.48 | 5.67 | 2.79 |
| 2020 | 3.33 | 4.01 | 2.66 |
| 2019 | 2.79 | 3.74 | 1.95 |
| 2018 | 3.28 | 5.7 | 1.96 |
| 2017 | 9.2 | 15.52 | 5.04 |
| 2016 | 16.22 | 19.69 | 10.06 |
| 2015 | 13.38 | 19.99 | 7.59 |
| 2014 | 9.23 | 11.57 | 6.34 |
| 2013 | 5.88 | 7.14 | 4.53 |
| 2012 | 4.67 | 5.92 | 3.75 |