1. Imports, exports, and the trade balance The following table shows the approximate value of exports and imports for the United States from 1968 through 1972. Complete the table by calculating the surplus or deficit both in dollar terms and as a percentage of GDP. If necessary, round your answers to the nearest hundredth. GDP Exports Imports Exports - Imports Year (Billions of dollars) (Billions of dollars) (Billions of dollars) (Billions of dollars) (Percentage of GDP) 1968 910.0 47.9 46.6 1969 985.0 51.9 50.5 1970 1,039.0 59.7 55.8 1971 1,127.0 63.0 62.3 1972 1,238.0 70.8 74.2 Source: "Income, Expenditures, Poverty, & Wealth: Gross Domestic Product (GDP)," United States Census Bureau, United States Department of Commerce, last modified September 2011, accessed June 10, 2013, https://www.census.gov/library/publications/2011/compendia/statab/131ed/income-expenditures-poverty-wealth.html. Between 1970 and 1971, the in dollar terms and as a percentage of GDP