EUGENIC TENDENCIES IN POPULATION 267 



proportions in the upper age groups and a reduction in the lower age groups. 

 On the basis of 100, in 1920 the group under five years of age was 10.9 and 

 in 1930 it was 9.3; in 1920 the group from five to nine was 10.8 and in 1930 

 it was 10.3; and in 1920 the group from ten to fourteen was 10.1 and in 

 1930 it was 9.8. Thus in each group up to fourteen years there was a smaller 

 proportion of the population in 1930 than in 1920. However, in 1920 the 

 group from fifteen to nineteen was 8.9 and in 1930 it was 9.4; in 1920 the 

 group from twenty to twenty-four was 8.8 and in 1930 it was 8.9; in 1920 

 the group from forty-five to fifty-four was 9.9 and in 1930 it was 10.6; in 

 1920 the group from fifty-five to sixty-four was 6.2 and in 1930 it was 6.8. 

 In all the higher groups there is a larger proportion, with the exception of 

 the groups twenty-five to thirty-four. This exception may be accounted 

 for by the losses of the youth of the country during the Great War. The 

 general trend would seem to forecast a definite decline in population since 

 there will be fewer young people to marry and propagate in the succeeding 

 decades, if the death rate remains constant. 



Another significant feature of the study of our latest census is the decided 

 decline in the rate of the negro population growth. The percentage rate of 

 increase for the negroes was 13.6 but the rate of increase for the whites was 

 15.7. In 1920, the negro population constituted 9.9 per cent of the total 

 population, but in 1930 it was less than 9.7. In 1790 the percentage was as 

 high as 19.3. The proportion of the negro population has been declining 

 constantly. This fact represents a significant feature in American life. 

 Numerically, the negro population has increased from 10,463,131 in 1920 

 to 11,891,143 in 1930. 



The Mexicans, Filipinos and Indians show perceptible increases in the 

 continental United States population in the last decade. The increase in 

 Indian population from 244,437 in 1920 to 332,397 in 1930 may be largely 

 due to more accurate statistics. The Mexican population increased 103.1 

 per cent from 700,541 in 1920 to 1,422,533 in 1930 and the Filipino popu- 

 lation increased 706.9 per cent from 5,603 in 1920 to 45,208 in 1930. The 

 admixture of Filipino and Mexican blood to our stock is of significant 

 eugenic importance. 



The 1930 census reflects the effects of our program of immigration re- 

 striction. The total immigration for the decade was 4,107,209, which is 

 less than half the number for the decade 1901 to 1910. This figure does not 

 represent a net increment to our population. This number of immigrants 

 must be reduced by an emigration of 1,045,076 aliens during the same 

 decade, thus leaving a net immigration of 3,062,133. The total foreign- 

 born white population in 1930 was 13,366,407, showing an increase of 0.8 



