| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.02 | 2.61 | 1.54 |
| 2023 | 3.37 | 5.09 | 2.39 |
| 2022 | 2.84 | 4.2 | 1.9 |
| 2021 | 3.72 | 4.96 | 2.6 |
| 2020 | 5.69 | 7.33 | 3.52 |
| 2019 | 3.57 | 5.03 | 2.64 |
| 2018 | 4.73 | 7.75 | 2.76 |
| 2017 | 8.18 | 9.84 | 6.57 |
| 2016 | 8.31 | 11.75 | 6.74 |
| 2015 | 28.87 | 67.71 | 8.36 |
| 2014 | 22.06 | 52.42 | 13.41 |
| 2013 | 6.55 | 14.98 | 4.31 |
| 2012 | 4.37 | 4.74 | 4.07 |