Year	% of total merchandise exports
1964	37.93103448275862
1965	40
1966	92.37288135593221
1967	88.57142857142857
1968	79.59183673469387
1969	29.577464788732392
1970	19.83805668016195
1971	22.869955156950674
1972	25.38860103626943
1973	15.42414898119597
1974	14.770861925136568
1975	16.672197989759148
1976	8.514206787687451
1977	9.653398174180172
1978	7.333729646652844
1979	10.486585739059471
1980	15.164655348742073
1981	20.369282725203732
1982	13.669811967821904
1983	17.576665418383055
1984	13.89805621591386
1985	12.002402328410614
1986	5.259481614039139
1987	12.02341722049375
1988	12.462221730797582
1989	28.63983366760824
1990	30.69269269269269
1991	23.16186519433663
1992	13.890572329208794
1993	28.385879651651457
1994	31.224050920889347
1995	31.145660896765975
1996	13.929797660732254
1997	20.62397452149026
1998	25.571228995532802
1999	37.23157489157701
2000	9.998517475349091
2001	9.388884498128567
2002	9.265788234011833
2003	9.683020373809306
2004	5.4991481349917954
2005	3.854532415453085
2006	4.133102666368741
2007	3.403665523341874
2008	0.6978016278615077
2009	0.7217108964220371
2010	0.6200735783404591
2011	0.4871828104380022
2012	0.4600126054743827
2013	0.2340306316234202
2014	0.4683253290639802
2015	4.2646790593716215
2016	2.9255353239236164
2017	0.03695396126517549
2018	0.21917250597270135
2019	0.0003710663184728772
2020	1.7553041498837099