年份 | 原始值 | 级比值 |
2012 | 19,428 | / |
2013 | 19,876 | 0.977 |
2014 | 22,142 | 0.898 |
2015 | 22,725 | 0.974 |
2016 | 23,608 | 0.963 |
2017 | 24,775 | 0.953 |
2018 | 26,519 | 0.934 |
2019 | 26,833 | 0.988 |
2020 | 29,193 | 0.919 |
2021 | 31,302 | 0.933 |