What has happened to the size of international trade (relative to US GDP) since the late 1920's? With what countries or regions does the United States trade the most?

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The Answer is The relative size of total world trade has been fluctuating since the late 1920s. Before the Great Depression, total world trade was around 60% of the U.S.'s GDP. The ratio had fallen to 20% by 1950. After that, world trade has grown rapidly in some years, and slowly in some other years. Today, world trade is around 220% of the U.S.'s GDP. World trade now amounts to more than 40 trillion dollars.
Exports to Canada and Mexico make up the largest percentage of total U.S. exports to individual countries. Imports from China and Canada make up the largest percentage of U.S. imports. The largest regions that the U.S. exports to are the Pacific Rim and the European Union.

What Has Happened to the Size of International Trade (Relative