| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.56 | 5.76 | 3.93 |
| 2024 | 4.55 | 6.64 | 2.92 |
| 2023 | 9.42 | 14.84 | 6.17 |
| 2022 | 7.76 | 9.97 | 5.63 |
| 2021 | 7.61 | 12.67 | 5.19 |
| 2020 | 5.26 | 10.69 | 3.07 |
| 2019 | 3.15 | 4.85 | 1.82 |
| 2018 | 2.52 | 3.67 | 1.48 |
| 2017 | 4.59 | 7.15 | 3.46 |
| 2016 | 6.32 | 9.17 | 4.19 |
| 2015 | 6.79 | 10.61 | 4.45 |
| 2014 | 3.89 | 6 | 2.94 |
| 2013 | 2.51 | 3.43 | 1.66 |
| 2012 | 2.04 | 3.02 | 1.38 |