| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.22 | 21.75 | 14.99 |
| 2024 | 16.3 | 20.28 | 13.67 |
| 2023 | 13.62 | 20.36 | 10.19 |
| 2022 | 9.86 | 12.22 | 7.36 |
| 2021 | 7.4 | 9.96 | 5.85 |
| 2020 | 16.16 | 24.11 | 9.09 |
| 2019 | 15.36 | 23.31 | 9.84 |
| 2018 | 16.19 | 24.96 | 9.75 |
| 2017 | 44.43 | 71.19 | 23.73 |
| 2016 | 46.53 | 80.92 | 25.93 |
| 2015 | 33.77 | 70.09 | 14.1 |
| 2014 | 12.62 | 17.88 | 9.44 |
| 2013 | 10.15 | 13.16 | 8.7 |
| 2012 | 11.68 | 13.76 | 8.49 |
| 2011 | 14.84 | 18.61 | 11.88 |