September 4, 2015 1:53 PM EDT

Labor unions were a prominent part of 20th-century America. But, in 2014, only 11.1% of American workers were members of unions, according to the Bureau of Labor Statistics. What happened to unions, and why are they a diminishing part of working life?

Watch the video above to find out why labor unions have been on the decline.

Write to Arpita Aneja at

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