| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.09 | 9.14 | 5.28 |
| 2024 | 5.42 | 7.15 | 4.17 |
| 2023 | 8.68 | 12.65 | 5.87 |
| 2022 | 7.36 | 10.16 | 5.39 |
| 2021 | 9.45 | 12.16 | 7.03 |
| 2020 | 11.8 | 18.1 | 7.12 |
| 2019 | 8.53 | 10.8 | 7.07 |
| 2018 | 10.62 | 14.9 | 7.16 |
| 2017 | 17.73 | 26.7 | 12.33 |
| 2016 | 30.62 | 39.25 | 25.75 |
| 2015 | 35.28 | 71.47 | 15.45 |
| 2014 | 16.69 | 22.85 | 13.23 |
| 2013 | 13.24 | 20.29 | 8.85 |