| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.94 | 7.9 | 3.88 |
| 2024 | 6.07 | 8.03 | 4.23 |
| 2023 | 5.81 | 8.12 | 4.02 |
| 2022 | 8 | 12.53 | 5.26 |
| 2021 | 7.47 | 22.34 | 1.37 |
| 2020 | 1.13 | 2.28 | 0.63 |
| 2019 | 1.15 | 1.65 | 0.67 |
| 2018 | 2.18 | 3.8 | 1.1 |
| 2017 | 4.92 | 8.21 | 2.89 |
| 2016 | 10.29 | 18.34 | 6.48 |
| 2015 | 8.42 | 15.7 | 3.06 |
| 2014 | 4.11 | 6.27 | 2.99 |
| 2013 | 5.37 | 6.53 | 4.73 |