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Table 3 Statistical characterization of demographic quantiles, 1950–1990

From: The changing influence of city-systems on global shipping networks: an empirical analysis

Quantiles Thresholds (000 s inhabitants)
1950 1960 1970 1980 1990
 1 9 6 5 30 84
 2 46 65 93 122 144
 3 90 114 139 193 230
 4 155 183 242 310 380
 5 290 351 441 532 633
 6 711 917 1,067 1,128 1,403
 6a 17,363 20,548 23,585 25,978 28,738
Quantiles Population share (% inhabitants)
1950 1960 1970 1980 1990
 1 0.8 1.0 1.2 1.6 1.7
 2 1.9 2.1 2.3 2.7 2.6
 3 3.5 3.5 3.8 4.2 4.3
 4 6.4 5.9 6.5 7.2 7.0
 5 12.8 13.1 13.2 14.0 13.8
 6 74.6 74.3 73.0 70.3 70.5
 World 100.0 100.0 100.0 100.0 100.0
Quantiles Mean population (000 s inhabitants)
1950 1960 1970 1980 1990
 1 28 42 61 93 117
 2 66 88 114 151 183
 3 119 148 185 245 292
 4 223 252 315 406 482
 5 439 531 647 789 956
 6 2,553 3,098 3,589 4,007 4,822
 World 574 693 817 949 1,145
Quantiles Standard deviation (000 s inhabitants)
1950 1960 1970 1980 1990
 1 9 14 19 17 14
 2 13 15 14 22 23
 3 18 21 26 34 45
 4 42 50 57 68 70
 5 117 152 160 171 221
 6 2,731 3,302 3,982 4,377 4,780
 World 1,435 1,731 2,052 2,261 2,574
  1. Source: own realization based on Geopolis data
  2. ahigher threshold of the last quantile