Population gains in the United States and Canada.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001723:Birth Rate; D002170:Canada; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011158:Population Growth; D013997:Time Factors; D014481:United States