年份 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
数量 | 5 | 0 | 2 | 2 | 6 | 6 | 16 | 26 | 69 | 121 | 237 |
比例 | 1.0% | 0.0% | 0.4% | 0.4% | 1.2% | 1.2% | 3.3% | 5.3% | 14.1% | 24.7% | 48.4% |