Year	% of merchandise exports
1962	3.9503518347738305
1963	0.4592759904004197
1964	2.5564644576593523
1965	3.534373280557495
1966	0.6385779006956764
1967	0.4846625292089326
1968	0.001960642170359981
1969	0.006980792682043721
1970	0.0654646203306983
1971	0.009652429844660736
1972	7.668731238354133
1973	10.553680286328687
1974	9.732448325658122
1975	7.942934474964256