Estimates of the population of states, by age: July 1, 1981.
D017677:Age Distribution; D000367:Age Factors; D000569:Americas; D003710:Demography; D019049:Developed Countries; D009656:North America; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D014481:United States
Age Distribution--statistics; Age Factors; Americas; Demographic Factors; Developed Countries; North America; Northern America; Population; Population Characteristics; Population Dynamics; United States