Very statistical but interesting.

Union demographics have changed a lot over the past 35 years. To start, there has been a significant decline in union membership throughout the U.S. during the last few decades. In 1983, 20.1% of employed wage and salary workers were unionized, which fell to 12.4% in 2008. According to the U.S. Bureau of Labor Statistics' (BLS) latest union membership statistics, this number was down to 10.5% in 2018.

Around the middle of the last century, labor unions represented about a third of all American workers. Since then, the United States labor movement has undergone major changes, particularly in recent years — not the least of which has been shrinking membership. In 1983, 17.7 million workers were part of a union. Almost 10 years ago, the number dropped to 16.1 million, and in 2018, that number dipped to 14.7 million.

The dwindling membership base is not the only factor affecting unionized labor in the U.S. — racial, ethnic, gender, and industry-distribution demographics have also changed significantly since 1983.