"U.S. Bureau of the Census, International Data Base"
 
"Table 004. Enumerated and Adjusted Census Population by Age,Sex,Urban/Rural Res"
"----------------","---------------","---------------","---------------"
"Country or area/"," "," "," "
"Year/ ","  "," "," "
"Res/ "," "," "," "
"Type/ "," "," "," "
"Age "," Both sexes"," Male"," Female"
"----------------","---------------","---------------","---------------"
"Marshall Islands/1980/Total/Enu"
 
"Total, all ages ", 30873, 15851, 15022
" 0 ", 1545, 796, 749
" 1- 4 ", 4957, 2581, 2376
" 5- 9 ", 5023, 2661, 2362
" 10-14 ", 4054, 2117, 1937
" 15-19 ", 2956, 1434,  1522
" 20-24 ", 2601, 1223, 1378
" 25-29 ", 2225, 1142, 1083
" 30-34 ", 1779, 930, 849
" 35-39 ", 1136, 608, 528
" 40-44 ", 819, 436, 383
" 45-49 ", 809, 409, 400
" 50-54 ", 699, 376, 323
" 55-59 ", 664,  332, 332
" 60-64 ", 642, 359, 283
" 65-69 ", 423, 212, 211
" 70-74 ", 244, 107, 137
" 75+ ",  297, 128, 169
"----------------","---------------","---------------","---------------"
"Source: U.S. Bureau of the Census, International" 
" Data Base."