Year	% of total merchandise exports
1966	4.3478260869565215
1967	9.090909090909092
1968	5.555555555555555
1969	4.422718808193669
1970	4.444444444444445
1971	3.1746031746031744
1972	5.88235294117647
1973	15.691367456073339
1974	6.963569124242662
1975	5.799112097669257
1976	5.248578509986879
1977	2.5108168349285434
1978	6.660746003552398
1979	10.308069502185269
1980	6.726935818967937
1981	13.226732267322674
1982	10.896002236511043
1983	4.496320147194112
1984	6.838175852394313
1985	4.181491398598833
1986	16.305902546009346
1987	9.95577218160484
1988	8.610900832702498
1989	11.72267284676732
1990	10.302499759505356
1991	11.894130312573173
1992	17.99997464798831
1993	17.999978196006072
1994	17.877039392317347
1995	2.0293821981377405
1996	2.3142047888912143
1997	2.3153364344206784
1998	2.3777787223273785
1999	8.414592525374317
2000	0.6520081834734078
2001	1.2108857509278461
2002	19.170382088328168
2003	10.06634098116302
2004	14.141916381993088
2005	14.611519274811375
2006	15.642792005315313
2007	5.0536766935393205
2008	4.495763100113428
2009	6.818886892204253
2010	5.734402890734783
2011	11.193687429885872
2012	10.395609964387686
2013	15.708880457963042
2014	9.140852756269696
2015	22.265660749902047
2016	27.974597877586895
2017	35.50055989929347
2018	37.572230451085545
2019	43.8462041262964
2020	29.378691607203894