"U.S. Bureau of the Census, International Data Base"
 
"Table 088. Heads of Households, by Age, Sex, and Urban/Rural Residence"
"----------------","-------------","-------------","-------------"
"Country or area/"," "," "," "
"Year/ "," "," "," "
"Res/ "," "," "," "
"Age "," Both sexes"," Male"," Female"
"----------------","-------------","-------------","-------------"
"Marshall Islands/1980/Total"
 
"Total, all ages ", 3871, (NA), (NA)
" 15-19 ", 44, (NA), (NA)
" 20-24 ", 221, (NA), (NA)
" 25-29 ", 438, (NA), (NA)
" 30-34 ", 580, (NA), (NA)
" 35-44 ", 881, (NA), (NA)
" 45-54 ", 729, (NA), (NA)
" 55-59 ", 298, (NA), (NA)
" 60-64 ", 309, (NA), (NA)
" 65+ ", 371, (NA), (NA)
"----------------","-------------","-------------","-------------"
"Source: U.S. Bureau of the Census, International" 
" Data Base."