| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.07 | 2.22 | 1.83 |
| 2024 | 1.9 | 2.46 | 1.46 |
| 2023 | 3.16 | 4.84 | 2.17 |
| 2022 | 4.79 | 8.33 | 2.81 |
| 2021 | 7.21 | 13.23 | 3.53 |
| 2020 | 3.91 | 6.91 | 2.23 |
| 2019 | 2.64 | 4.45 | 2.07 |
| 2018 | 2.77 | 4.1 | 1.79 |
| 2017 | 5.32 | 6.72 | 3.69 |
| 2016 | 7.64 | 11.82 | 6.59 |
| 2015 | 11.92 | 21.56 | 6.32 |
| 2014 | 6.92 | 8.23 | 5.92 |
| 2013 | 7.09 | 9.65 | 5.51 |
| 2012 | 8.61 | 9.89 | 7.5 |