年份 时间/h | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
>24, ≤48 | 8 | 3 | 3 | 3 | 3 | 4 | 2 | 5 | 2 | 8 | 4 |
>48, ≤72 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
最长持续时间 | 60 | 37 | 31 | 32 | 37 | 33 | 62 | 44 | 30 | 37 | 58 |