| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 16.18 | 20.07 | 14.24 |
| 2024 | 13.14 | 22.64 | 6.59 |
| 2023 | 11.63 | 15.12 | 10.46 |
| 2022 | 12.61 | 18.94 | 10 |
| 2021 | 15.51 | 21.27 | 11.32 |
| 2020 | 27.18 | 44.94 | 15.78 |
| 2019 | 26.16 | 41.52 | 13.08 |
| 2018 | 15.5 | 30.95 | 5.57 |
| 2017 | 12.6 | 18.59 | 7.81 |
| 2016 | 17.57 | 21.3 | 12.01 |
| 2015 | 21.07 | 38.39 | 10.51 |
| 2014 | 15.58 | 29.32 | 8.47 |
| 2013 | 9.02 | 11.96 | 7.6 |
| 2012 | 9.24 | 11.78 | 6.23 |
| 2011 | 12.03 | 13.98 | 9.96 |