Trends can be important. Notwithstanding powerful political support for organized labor from the Obama Administration, the recent trend of American workers to not join unions is continuing.

Every two years, the American Federation of Labor-Congress of Industrial Organizations, known as "AFL-CIO", discloses the numbers of dues-paying members of its constituent national and international affiliates in the United States. The table below contains the just-released data from 2012-13 and includes some interesting historical data (expressed in thousands).

PERIOD

MEMBERSHIP

PERIOD

MEMBERSHIP

1955

12,622

1980-81

13,602

1956-57

13,020

1982-83

13,758

1958-59

12,779

1984-85

13,109

1960-61

12,553

1986-87

12,702

1962-63

12,496

1988-89

13,556

1964-65

12,919

1990-91

13,933

1966-67

13,781

1992-93

13,299

1968-69

13,005

1994-95

13,007

1970-71

13,177

1996-97

12,905

1972-73

13,407

1998-99

12,952

1974-75

14,070

2000-01

13,164

1976-77

13,542

2004-05

12,976

1978-79

13,621

2008-09

8,374

2012-13

8,429

Overall, union membership in the United States over the past two years was fairly flat. The relatively small overall membership increase between 2012 and 2013 was due in part to the return of some unions that had disaffiliated from the AFL-CIO. Several large unions suffered significant decreases in membership, notably the Communication Workers, the Electrical Workers and the UAW. Significant membership increases were reported, however, for the American Federation of Government Employees and UNITE HERE.

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