The number of jobs in manufacturing has declined by 7,231,000–or 37 percent–since employment in manufacturing peaked in the United States in 1979, according to data published by the Bureau of Labor Statistics.
The real median household income of Americans who have completed high school–but have not attained a higher degree–also peaked in the 1970s and has declined since then.
In fact, according to the Census Bureau (Tables H-13 and H-14), the real median household income of an American householder who has completed four years of high school peaked in 1973 at $56,395 in constant 2013 dollars. By 2013, it was down to $40,701. That is a drop of $15,694–or 27.8 percent. (The Census Bureau’s Table H-14 publishes the annual median household income from 1960 through 1990 of householders who have “completed” four years of high school. Table H-13 publishes the annual median household income of householders who have ‘graduated” from high school or its equivalency from 1991 through 2013.)