1>.1972-2001 U.S. export data - ASCII
2>.1972-1988 U.S. export data - Original data
3>.1972-2006 U.S. import data-SAS and STATA
1>.1972-2001 U.S. export data - ASCII
2>.1972-1988 U.S. export data - Original data
3>.1972-2006 U.S. import data-SAS and STATA
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