"U.S. Bureau of the Census, International Data Base"
 
"Table 024. Number of Births, by Sex, Age of Mother, and Urban/Rural Residence"
"----------------","---------------","---------------","---------------"
"Country or area/"," "," "," "
"Year/ ","  "," "," "
"Res/ "," "," "," "
"Age "," Total"," Male"," Female"
"----------------","---------------","---------------","---------------"
"Northern Mariana Islands/1980/Total"
 
"Total, all ages ", 731, (NA), (NA)
" 15-19 ", 55, (NA), (NA)
" 20-24 ", 208, (NA), (NA)
" 25-29  ", 204, (NA), (NA)
" 30-34 ", 173, (NA), (NA)
" 35-39 ", 91, (NA), (NA)
"----------------","---------------","---------------","---------------"
"Source: U.S. Bureau of the Census, International" 
" Data Base."