<P> The Economist reported in January 2017 that manufacturing historically created good paying jobs for workers without a college education, particularly for men . Unions were strong and owners did not want to risk strikes in their factories due to large capital investments . Such jobs are much less available in the post-1990 era in the U.S. and other developed countries, leading to calls to bring those jobs back from overseas, establish protectionism, and reduce immigration . Manufacturing continues to evolve, due to factors such as information technology, supply chain innovations such as containerization, companies un-bundling tasks that used to be in one location or business, reduced barriers to trade, and competition from low - cost developing countries such as China and Mexico . </P> <P> Manufacturing is conducted among globally distributed supply chains, with various stages of production conducted in different countries . For example, automotive parts may be manufactured in the U.S., shipped to Mexico for assembly, then sent back to the U.S. In some cases, the components of the final product cross the border multiple times . An estimated 40% of the value of U.S. imports from Mexico is from content produced in the U.S.; this figure is 25% for Canada but only 4% for China . This "production sharing" is an indication of the integrated nature of the supply chains between the U.S., Mexico and Canada in the NAFTA region . </P> <P> The largest manufacturing industries in the United States by revenue include petroleum, steel, automobiles, aerospace, telecommunications, chemicals, electronics, food processing, consumer goods, lumber, and mining . A large portion of U.S. industrial output, the United States leads the world in airplane manufacturing . American companies such as Boeing, Cessna (see: Textron), Lockheed Martin (see: Skunk Works), and General Dynamics produce a vast majority of the world's civilian and military aircraft in factories stretching across the United States . </P> <P> U.S. manufacturing employment has declined steadily as a share of total employment, from around 28% in 1960 to 8% in March 2017 . Manufacturing employment has fallen from 17.2 million persons in December 2000 to 12.4 million in March 2017, a decline of about 5.7 million or about one - third . An estimated 1 - 2 million of the job losses in manufacturing 1999--2011 were due to competition with China, which entered the World Trade Organization in December 2001 . The Economic Policy Institute estimated that the trade deficit with China cost about 2.7 million jobs between 2001 and 2011, including manufacturing and other industries . </P>

What does the united states produce the most of
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