Exports Mr. David Watkins asked the Minister for Trade what was the percentage of gross domestic product exported by the United Kingdom for each year from 1977–78 to 1981–82; and what is his estimate for 1982–83. Mr. Peter Rees Exports and gross domestic product are best compared on a factor cost basis; this information is only available for calendar years and is as follows: -- || -- * at factor cost. † on information available, little change from previous year.