| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 6.65 | 9.37 | 4.17 |
| 2023 | 6.12 | 7.42 | 4.87 |
| 2022 | 6.28 | 7.83 | 4.93 |
| 2021 | 5.86 | 9.06 | 3.58 |
| 2020 | 5.76 | 8.42 | 4.28 |
| 2019 | 5.12 | 6.14 | 4.06 |
| 2018 | 8.52 | 13.3 | 4.92 |
| 2017 | 15.05 | 20.18 | 10.48 |
| 2016 | 23.59 | 31.55 | 17.14 |
| 2015 | 16.82 | 21.54 | 10.99 |
| 2014 | 13.86 | 17.91 | 10.9 |
| 2013 | 12.85 | 16.5 | 10.57 |