Year	% of total merchandise exports
1964	0.501952035694367
1965	0.7318348144276007
1966	0.10741138560687433
1969	0.4388198292646398
1970	1.9802960329518504
1971	2.8386551026757934
1972	1.6126169053825528
1973	1.3794883917684824
1974	1.5113574219005528
1975	3.2699556382183395
1976	5.939306093242575
1977	6.124007657272845
1978	2.606245944599722
1979	1.193369157225816
1980	6.226811171998425
1981	10.753475566394078
1982	11.939373155784953
1983	20.24371272522406
1984	7.462002173284805
1985	7.284349364570388
1986	0.7655996676580554
1987	2.7112919760390417
1988	5.369263478125594
1989	5.795945702928792
1990	3.7786640483093854
1991	0.9868334040808512
1992	1.2203853484628526
1993	0.7712672355497253
1994	0.18737991565291137
1995	0.9839496340014815
1996	1.1143145469965736
1997	1.4350711893641115
1998	0.8200600640929142
1999	3.1084802426081106
2000	2.2468851611373317
2001	1.5020487513159224
2002	5.0982898681103235
2003	2.789623491211806
2004	3.103320058522292
2005	4.53302708710037
2006	4.33461015766928
2007	3.1166259500108033
2008	4.0961670065944205
2009	5.3938076887220925
2010	2.9627167372275687
2011	2.9270652743161025
2012	3.3527816015222847
2013	4.581328060310736
2014	4.907325069007511
2015	3.4251329687441907
2016	1.5232966697010952
2017	3.4847214331389544
2018	5.0804042644564795
2019	3.713124789467568
2020	4.038879628585918