Year	% of merchandise exports
1962	75.25669716654875
1963	79.96210038338252
1964	81.85207932605984
1965	80.09389019010406
1966	80.26071511033275
1967	86.11650563462095
1968	88.03646172240461
1969	85.01339353100337
1970	71.20774454228793
1971	67.51004250937689
1972	67.77565065750974
1973	66.41484612370057
1974	66.85048175922226
1975	66.92572877345788