Final answer:
The U.S. held a dominant position in the global automobile market by 1955, with American factories producing a major portion of the world's automobiles at the time. Although the exact percentage is not specified in the information provided, the U.S. was manufacturing 50% of all manufactured goods globally by the end of World War II.
Step-by-step explanation:
By the mid-20th century, particularly by 1955, the United States had established significant dominance in automobile production. The information provided does not explicitly state the percentage of the world's automobiles that the U.S.A. was making by 1955, but it hints at the considerable impact of American auto industry, which began to mass-produce automobiles by 1920. This growth continued well after World War II, with the U.S. producing 50% of all manufactured goods globally by the end of the war, indicating the U.S. also held a substantial share in automobile manufacturing during the 1950s.
In the context of the American economy and automotive industry, the rise of government interference in the economy during wartime production and the increase in US factory production, which included automobiles, are significant indicators of the U.S. positioning in the auto market. It is important to note that the U.S. had produced 40 percent of goods and services worldwide by 1950, which also underscores the country's substantial share in global manufacturing.