January 27, 2013 § Leave a comment
You can find annual union membership figures on the Bureau of Labor Statistics web site: http://www.bls.gov/cps/cpslutabs.htm.
But the BLS stats go back just a dozen years. If you want to see how far union membership has declined over several decades, try the Unionstats database, which is maintained by scholars at Georgia State University and Trinity University. http://www.unionstats.com
This will take you back to 1973, broken down by various sectors. The database has some categories that I hope to chart in the future, such as union membership by very granular occupation categories, as well as state membership density from 1964 to date.