Domestic and personal service occupations 5
Professional occupations 3
Public service occupations 1
----
Total 100

The figures in the column at the right of the table represent the
number of native born men between the ages of 21 and 45 among each
hundred native born male inhabitants engaged in the occupations
comprehended in the various groups. In the case of the industrial
group the figure is too high, as the census data relative to the
distribution of foreign and native born include all ages, and there is
a smaller proportion of American born adult men employed in industry
than is found in the lower age groups. Extensive computations have
shown, however, that the inaccuracies due to this cause are not
serious enough to affect the use of the figures for our purpose.

Let us now consider what these proportions mean in establishing
vocational courses to prepare boys for wage-earning pursuits. The
future expectations of the boys in a large elementary school enrolling
say 1,000 pupils of both sexes would be about as follows:

_Number of boys who will enter_
Manufacturing and mechanical occupations 220
Commercial occupations 100
Clerical occupations 80
Transportation occupations 55
Domestic and personal service occupations 25
Professional occupations 15
Public service occupations 5