Percent of workers in a labor union

30%

29%

20%

15%

10%

5%

0%
1930

Because of widespread dissatisfaction
over such issues as wage and fair
treatment, union membership grew ...but has declined steadily since
quickly in the 1930s... its peak in the 50s, largely
because of the changing
composition of the workforce.

1940 1950 1960 1970 1980 1990 2000 2010 2020

Year