Workers, Aged 10-14, in the United States: 1870-1930
(thousands)
Year
Workers
Aged
10-14
Workers Aged
10-14 as % of
Workforce
1890
1,504
6.50
1910
1,622
4.34
1930
667
1.37
Source: U.S. Census Bureau
Which reason contributed to the trend shown in this table?