Table : TABLE 1-2: Trade/GDP Ratio in 2010 This table shows the ratio of total trade to GDP for each country, where trade is calculated as (Imports + Exports)/2, including both merchandise goods and services. Countries with the highest ratios of trade to GDP tend to be small in economic size and are often important centers for shipping goods, like Hong Kong (China) and Singapore. Countries with the lowest ratios of trade to GDP tend to be very large in economic size, like Japan and the United States, or are not very open to trade because of trade barriers or their distance from other countries.