| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.92 | 7.71 | 4.62 |
| 2024 | 4.59 | 6.75 | 3.01 |
| 2023 | 5.17 | 5.97 | 4.37 |
| 2022 | 4.66 | 7.81 | 3.63 |
| 2021 | 4.46 | 5.5 | 3.35 |
| 2020 | 5.5 | 7.5 | 4.42 |
| 2019 | 5.43 | 6.93 | 4.28 |
| 2018 | 6.77 | 10.72 | 3.79 |
| 2017 | 11.04 | 15.23 | 8.73 |
| 2016 | 17.95 | 31.23 | 13.5 |
| 2015 | 35.11 | 68.01 | 15.79 |
| 2014 | 19.8 | 26.29 | 15.53 |
| 2013 | 21.04 | 30.4 | 15.28 |
| 2012 | 15.02 | 18.13 | 12.58 |
| 2011 | 25.43 | 48.58 | 15.74 |