Labels:text | map | atlas OCR: Early Population 1900 1920 Population per Sq. Mile Population per Sq. Mile 4.4 or less 15.9 or less 4.5-11.9 16.0-29.9 12.0-22.9 30.0-49.9 23.0-34.9 50.0-109.9 35.0 or more 148.2 Location of 50% or more . Location of 50% or more of county population of county population Location of 75% or more . Location of 75% or more of county population of county population 1940 1960 Population per Sq. Mile Population per Sq. Mile 16.9 or less 59.9 or less 17.0-34.9 60.0-174.9 35.0-79.9 175.0-399.9 80.0-174.9 400.0-699.9 175.0 or more 1971.1 Location of 50% or more . Location of 50% or more of county population of county population * Location of 75% or more Location of 75% or more of county population of county population