| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.68 | 6.87 | 5.12 |
| 2024 | 5.08 | 6.7 | 3.69 |
| 2023 | 6.22 | 7.4 | 5.44 |
| 2022 | 6 | 7.18 | 4.79 |
| 2021 | 5.71 | 7.16 | 4.8 |
| 2020 | 8.04 | 9.92 | 6.18 |
| 2019 | 8.72 | 11.82 | 6.8 |
| 2018 | 11.27 | 15.93 | 7.9 |
| 2017 | 16.42 | 21.67 | 13.28 |
| 2016 | 19.94 | 27.4 | 16.47 |
| 2015 | 21.55 | 42.46 | 12.87 |
| 2014 | 13.88 | 18.46 | 11.06 |
| 2013 | 9.18 | 12.32 | 7.48 |
| 2012 | 8.63 | 10.36 | 7.35 |
| 2011 | 11.38 | 13.87 | 8.51 |