From 1950 to 2015 September 22, 2022 by 8i9x6 the U.S. economy roughly tripled in size. U.S. imports roughly tripled in size. the share of U.S. trade in the global economy roughly tripled in size. U.S. imports roughly tripled as compared to U.S. exports. U.S. exports roughly tripled in size. See Answer the share of U.S. trade in the global economy roughly tripled in size.