Year	% of total merchandise exports
1960	0.7320915577796312
1961	0.5393071976768306
1962	0.6328073635765943
1963	0.6083260041043683
1964	0.1135315404810899
1965	0.30160857908847183
1966	0.1757800238558604
1967	0.32777929527451516
1968	0.5493097008093163
1969	0.7506053268765133
1970	0.7119806828695868
1971	0.8995080007356998
1972	0.8379197328551111
1973	1.906411417660163
1974	4.491680659441307
1975	5.9373237462554
1976	3.470617228460594
1977	4.401540848953274
1978	2.6830152248421437
1979	3.1332792958220805
1980	2.920040025470754
1981	2.2469918473236006
1982	6.976603844872235
1983	7.4271603047589885
1984	8.418851913067074
1985	6.98030621542273
1986	7.8728642754043054
1987	4.383914013525008
1988	4.377691798326501
1989	4.323379304840884
1990	6.475326687721269
1991	5.1011776285160595
1992	5.149796500768397
1993	4.05331435786378
1994	3.558972979779996
1995	4.067032029002432
1996	5.988027236546572
1997	5.836360074282354
1998	4.782210914780955
1999	4.291708614652945
2000	4.671243928724022
2001	5.568891922833115
2002	5.486016104494372
2003	4.232899235087582
2004	5.011098937030671
2005	4.293737198718425
2006	3.4859301729794643
2007	4.716834249233277
2008	6.407129163521
2009	5.861976177821995
2010	6.570131666662402
2011	7.416944664250563
2012	6.492719497799869
2013	7.413053299276607
2014	7.996710042811116
2015	7.2109778989917075
2016	7.945216582808926
2017	7.90603222409913
2018	7.348525622187793
2019	7.273011560428583
2020	7.4946725365085065