Manufacturing employment in the U.S. peaked in June 1979 with 19,553,000 jobs (data here), and by July of this year manufacturing employment had fallen to 11,817,000, the lowest level of manufacturing jobs since April 1941 (see chart above).

As a percent of the total labor force, manufacturing employment fell below 9% in July (see chart below), the lowest level in BLS history (back to 1939).