Year	% of total merchandise exports
1960	0.08285004142502071
1961	0.13897662665824384
1962	0.07634559104211731
1971	0.17959609508905283
1972	0.44467066404152494
1973	0.7756155725084797
1974	1.880199940806998
1975	2.4912765878466163
1976	3.0348308501815895
1977	2.448186163569262
1978	2.142392900414838
1979	1.8832203216573533
1980	4.660463311187293
1981	5.683159538311164
1982	2.5672659015831325
1983	6.024992753984385
1984	6.0034671042263446
1985	5.318557044463165
1986	3.808218532275064
1987	2.606972576523557
1988	1.7694259575387548
1989	1.7814128487482432
1990	2.0768281640109523
1991	2.7528599974632355
1992	2.678414309406598
1993	2.1787624805940835
1994	1.460550906632698
1995	1.492173006411871
1996	2.010041101421928
1997	1.1414914657088266
1998	1.4799812251176014
1999	1.5933499843713321
2000	1.4423929657608932
2001	1.3019924487728742
2002	1.707353161447373
2003	1.5620265486347011
2004	1.3223566916194287
2005	1.5988399147461914
2006	2.1080848640732603
2007	2.127931604718126
2008	2.3814234749392393
2009	2.4674272684945286
2010	2.486972318363437
2011	3.0760035149482503
2012	3.041435835066065
2013	2.3217501794710316
2014	3.1810302829558044
2015	2.823972852983629
2016	3.2268961735427792
2017	2.3270366863016902
2018	2.256714739194198
2019	1.8789591692516543
2020	1.53476917064514