时间段 | 紧凑度指数 | 分维度指数 |
1973 | 0.008711298 | 1.578575564 |
1980 | 0.089092846 | 1.237312356 |
1990 | 0.092410207 | 1.229022617 |
2000 | 0.098350207 | 1.219069538 |
2010 | 0.089988836 | 1.219594605 |
2018 | 0.090533974 | 1.218759177 |