Year	% of merchandise exports
1962	31.947026342535235
1963	26.51911951622392
1964	32.6032644912823
1965	41.067461274074894
1966	35.649493232244126
1967	40.87586693998912
1968	41.82833068925285
1969	38.148431018578506
1970	36.06464885833836
1971	27.021277813996587
1972	37.23807015785453
1973	48.62098697471009
1974	43.91323904872607
1975	36.42857900110757
1976	35.86717967466458
1977	36.065611306174375
2008	55.41892657579665
2009	54.67931809589033
2010	40.047070708654175
2011	39.145174934844846
2012	17.43722323414557
2013	13.638504993183304
2014	14.495624447501163
2015	48.45610731276685
2016	56.91887521831329
2017	71.15901109623144
2018	65.89656175530152
2019	63.85210646801692