year rank population 1850 35 20061 1860 20 45246 1870 19 71440 1880 19 115587 1890 16 204468 1900 14 285315 1910 12 373857 1920 13 457147 1930 12 578249 1940 13 587472 1950 13 637392 1960 11 741324 1970 12 717099 1980 16 636212 1990 17 628088