A Paragraph to Ponder

From By the Numbers in the Manufacturing Landscape in the current issue of Mechanical Engineering:

"A General Motors plant that employed 5,000 workers to make 120,000 cars in 1965 now has 1,500 employees, and the  cars are more complex and higher quality.  This explains why, as U.S. factory jobs fell to 12 million in 2014, from 17 million in 2000, value added rose 33 percent, to nearly $2 trillion."