| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.76 | 6.74 | 5.03 |
| 2024 | 5.01 | 7.97 | 3.04 |
| 2023 | 4.81 | 6.24 | 3.97 |
| 2022 | 7.33 | 13.47 | 4.63 |
| 2021 | 2.81 | 8.75 | 2.17 |
| 2020 | 3.24 | 4.95 | 2.18 |
| 2019 | 2.81 | 4.06 | 2.29 |
| 2018 | 3.69 | 5.42 | 2.11 |
| 2017 | 6.45 | 8.87 | 4.48 |
| 2016 | 10.51 | 13.15 | 7.99 |
| 2015 | 9.94 | 16.98 | 6.84 |
| 2014 | 8.18 | 10.34 | 5.94 |
| 2013 | 7.58 | 9.23 | 5.94 |
| 2012 | 7.86 | 9.47 | 6.35 |