年份 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
中国 | 0.19085 | 0.24346 | 0.27299 | 0.36201 | 0.41629 | 0.42871 | 0.46686 | 0.15069 | 0.52812 | 0.62601 |