| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.53 | 9.53 | 6.06 |
| 2024 | 6.5 | 9.93 | 4.32 |
| 2023 | 7.9 | 10.18 | 6.4 |
| 2022 | 8.62 | 10.79 | 6.4 |
| 2021 | 12.06 | 24.45 | 7.71 |
| 2020 | 10.96 | 16.12 | 5.64 |
| 2019 | 3.53 | 6.17 | 1.95 |
| 2018 | 2.98 | 4.02 | 1.95 |
| 2017 | 3.59 | 4.67 | 2.92 |
| 2016 | 4.37 | 6.92 | 2.73 |
| 2015 | 4.16 | 5.96 | 2.63 |
| 2014 | 3.01 | 3.61 | 2.28 |
| 2013 | 3.11 | 3.56 | 2.76 |