At its height what percent of American workers were employed in an automotive related industry?

At its height, approximately 3-4% of American workers were employed in the automotive industry. This figure reflects the significant impact of the automotive sector on the U.S. economy during the mid-20th century, particularly in the post-World War II era when automobile production surged. The industry not only encompassed manufacturing but also included various related sectors, such as parts suppliers and service providers.