Year	% of merchandise exports
1963	68.90929854841725
1964	60.44230773053351
1965	60.18803867758589
1966	63.05831910946148
1967	68.75992565589848
1968	71.87260550412108
1969	70.33852329412731
1970	74.61615251565654
1971	69.98731593480181
1972	70.05623688019917
1973	65.83366090347542
1974	50.99228065505363
1975	53.08857082899871
1976	58.12774999738258
1978	60.87260121027742
1979	67.37703678377063
1980	50.74075097514268
1981	35.543010987020175
1982	34.04156023660261
1984	55.890712418665935
1985	52.5853521541077
1995	46.131372069207146
1996	25.02497341446587
1997	29.687653893304134
1998	24.34201971650293
1999	13.083918120122572
2000	4.720964667694494
2001	3.831143718926757
2002	5.235763413727742
2003	5.895250264010319
2004	4.175938084318991
2005	4.772121606003591
2006	2.3415315303395756
2007	1.641836190969605
2008	1.1555536286069106
2009	1.3981799131635977
2010	1.0214647477441334
2011	1.1639061827230976
2012	3.832633344908228
2013	0.5832203527489305
2014	2.316103677493066
2015	0.9365132441321918
2016	6.403366096158815
2017	6.044075252898454
2018	7.766633434975096