Year	% of total merchandise exports
1964	0.6369426751592357
1965	2.1621621621621623
1966	1.82648401826484
1967	2.719797596457938
1968	1.9909323871476443
1969	2.140041299042613
1970	1.9840812089052948
1971	1.1178861788617886
1972	0.8884098919344033
1973	0.526683404753365
1974	2.0843146490814886
1975	2.031231935191941
1976	0.6165928649009942
1977	1.0519729860697922
1978	0.6436947029290071
1979	2.803422236079331
1980	4.345727802218743
1981	2.734215703226185
1982	0.18614298440387708
1983	0.2088850477109575
1984	0.26815500542788806
1985	0.7834437040823379
1986	0.3382451303694749
1987	0.641744865729512
1988	0.7894914646108109
1989	0.6075331526134911
1990	1.4323077013228738
1991	1.26140774058199
1992	2.127335340847093
1993	4.425190190778885
1994	2.7699691645328204
1995	3.4178717751882948
1996	2.4969203141628227
1997	2.6337262657749356
1998	7.159988474606872
1999	7.184531526769159
2000	0.8098529486801852
2001	1.2241969348181703
2002	0.9038354365278423
2003	1.117275999157728
2004	0.8319805569720279
2005	0.9250181942326614
2006	1.8432818229509806
2007	1.1136526946527363
2008	3.1406417471200534
2009	1.2495487398221594
2010	2.4036556025032416
2011	1.539087967182228
2012	1.6807332350156592
2013	0.7002243103694964
2014	0.4716174561014447
2015	1.105273582667933
2016	0.9282472076938364
2017	1.745805021457794
2018	1.072445187702173
2019	1.05294592130641
2020	0.49242155368593676