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THE POPULATION OF THE PHILIPPINES - CICRED

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de Guzman<br />

Regional variations in the sex ratio by age group are<br />

displayed in Table 3. The variations may be attributed<br />

to various factors such as the sex ratio at birth,<br />

mortality differentials, and sex-selectivity in migration.<br />

For example, the preponderance of males in in-migration<br />

streams to Cagayan Valley, Bicol Region, and the two<br />

Mindanao regions have resulted in sex ratios well above<br />

1000. It is believed that the disappearance of frontier<br />

areas and the easing up of migratory movements have<br />

caused a gradual decline in the sex ratios. The slight<br />

excess of males in the Eastern Visayas region may be<br />

partly due to the larger number of females out-migrating<br />

from the area.<br />

Table 3. Sex Ratio by Regions and by Broad Age Groups, 1970<br />

Regions<br />

llocos Region<br />

Cagayan Valley<br />

Central Luzon<br />

Southern Luzon<br />

Bicol Region<br />

Western Visayas<br />

Central Visayas<br />

Eastern Visayas<br />

Western Mindanao<br />

Northern Mindanao<br />

Southern Mindanao<br />

Metropolitan Manila<br />

0-4<br />

1033<br />

1086<br />

1032<br />

1061<br />

1037<br />

1014<br />

1034<br />

1034<br />

1006<br />

1020<br />

1029<br />

1054<br />

5-14<br />

1087<br />

1066<br />

1059<br />

1054<br />

1060<br />

1023<br />

1055<br />

1055<br />

1045<br />

1051<br />

1066<br />

1013<br />

15-29<br />

940<br />

994<br />

922<br />

876<br />

955<br />

910<br />

905<br />

985<br />

889<br />

928<br />

945<br />

825<br />

SOURCE: NCSO, Census Report for 1970.<br />

30-39<br />

963<br />

1067<br />

1007<br />

1058<br />

1017<br />

1002<br />

976<br />

1019<br />

1052<br />

1109<br />

1177<br />

979<br />

40-49<br />

861<br />

935<br />

880<br />

956<br />

948<br />

848<br />

887<br />

930<br />

1010<br />

1053<br />

1102<br />

947<br />

50-69<br />

774<br />

956<br />

838<br />

876<br />

978<br />

875<br />

848<br />

971<br />

1083<br />

1066<br />

1170<br />

903<br />

70 +<br />

790<br />

982<br />

935<br />

946<br />

1124<br />

963<br />

938<br />

1044<br />

1192<br />

1150<br />

1126<br />

865<br />

37<br />

TOTAL<br />

959<br />

1029<br />

980<br />

994<br />

1016<br />

967<br />

961<br />

1014<br />

996<br />

1020<br />

1049<br />

933<br />

On the other hand, the low sex ratios in the other<br />

regions have been due to predominantly male outmigration,<br />

except Metropolitan Manila and Southern<br />

Luzon, where an increasing number of young female<br />

in-migrants have been recorded (note the very low sex<br />

ratios in the age group 15-29).<br />

That the urban areas are predominantly female is<br />

depicted in Table 4. In 11 out of 12 regions, the females

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