| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.55 | 6.09 | 4.92 |
| 2024 | 5.11 | 6.97 | 3.37 |
| 2023 | 6.75 | 9.52 | 5.13 |
| 2022 | 6.44 | 9.62 | 4.81 |
| 2021 | 5.03 | 6.42 | 4.16 |
| 2020 | 5.55 | 6.44 | 4.39 |
| 2019 | 6.11 | 8.76 | 4.51 |
| 2018 | 5.26 | 7.68 | 3.24 |
| 2017 | 8.26 | 10.01 | 7.11 |
| 2016 | 12.85 | 18.36 | 8.76 |
| 2015 | 14.64 | 25.26 | 7.9 |
| 2014 | 9.98 | 16.39 | 4.56 |
| 2013 | 4.5 | 6.05 | 3.64 |
| 2012 | 3.52 | 4.43 | 2.81 |
| 2011 | 4.63 | 6.7 | 3.31 |