Department of Rural Sociology
This publication projects South Dakota's total population in 1980 and for each of the six State Planning Districts, based on changes of the past 10 years in size of the various age segments, for both males and females.
Age and sex information for the census years 1970 and 1.980 is presented here in two ways to facilitate comparisons between South Dakota populations:
1. Age-sex "pyramids" graphically represent age and sex distribution of 1970 and 1980 populations for the State as a whole as well as for the six State Planning Districts. Each horizontal bar on a pyramid represents the proportion that each 5-year age category is of the total population. Each bar is divided by the vertical axis with the percentage of males to the left and females to the right. The vertical axis represents a zero point for each bar. Thus, the left bottom bar of each pyramid portrays the percent of male children under 5 years of age for a given year and area.
2. A "data table," under each pyramid, provides actual numbers of males, females and the total population by 5-year intervals for the census year 1970, and projections for 1980.
Robert T. Wagner, South Dakota population projections, South Dakota census data
South Dakota Agricultural Experiment Station, South Dakota State University
Wagner, R. T. and Butler, E. T., "1980 Population Projections for South Dakota" (1974). Research Bulletins of the South Dakota Agricultural Experiment Station (1887-2011). 624.