Year	% of merchandise exports
1962	0.8316101810408675
1963	0.3655687859283938
1964	0.25844767674363506
1965	0.2465827601401268
1966	0.1606347380863751
1967	0.06901019727997117
1968	0.04040014736351209
1969	0.03704867424576669
1970	0.025344731236189515
1971	0.023496415937865566
1972	0.1627469251172306
1973	0.20163393888408565
1974	0.027122913940386156
1975	0.005726674773893992
1976	0.00015096200940322249
1977	0.0022138023978781037
1978	0
1979	0
1981	0
2007	0.002368712023187666
2008	0.014430550886455383
2009	0.003195437688710168
2010	0.0012504193924323137
2016	0.07329410886617933
2017	0.07329410886617933
2018	0.048279661305272246
2019	0.028183594967799826