| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.87 | 7.48 | 4.92 |
| 2024 | 4.73 | 7.29 | 2.94 |
| 2023 | 5.7 | 7.95 | 4.04 |
| 2022 | 3.16 | 5.13 | 2.05 |
| 2021 | 4.71 | 6.01 | 3.79 |
| 2020 | 7.29 | 9.75 | 4.64 |
| 2019 | 4.73 | 6.29 | 3.12 |
| 2018 | 4.06 | 5.23 | 2.88 |
| 2017 | 4.18 | 5.04 | 3.21 |
| 2016 | 4.76 | 6.44 | 3.67 |
| 2015 | 14.63 | 28.55 | 6.02 |
| 2014 | 12.47 | 17.99 | 9.41 |
| 2013 | 9.03 | 11.51 | 6.12 |
| 2012 | 4.69 | 6.38 | 3.17 |