Year	% of total merchandise exports
1960	0.03630950219672489
1961	0.05986007706984922
1962	0.03295977698682451
1963	0.05934520199693779
1964	0.46642438384770085
1965	0.9426334761165561
1966	1.0140101468241873
1967	0.7695888097595448
1968	1.1140505540026264
1969	1.181576608808051
1970	1.0816036655925516
1971	1.3926231713104833
1972	0.881343172840461
1973	0.6388923076042407
1974	0.3585839497914586
1975	0.39549278905058854
1976	0.5161316517763507
1977	0.3809544424893992
1978	0.3740469153816667
1979	0.6647283108506737
1980	1.3049496204352287
1981	6.175840013969375
1982	7.601840002534402
1983	7.238683578179014
1984	6.117690828589871
1985	6.546340110795475
1986	4.508396761792753
1987	5.358829600023288
1988	4.882123669455258
1989	4.60290595140629
1990	2.82276575981717
1991	1.361059931803709
1992	0.3922418051044747
1993	1.0665346769397062
1994	1.8344912951672339
1995	1.5630269540781592
1996	1.5641400822204117
1997	1.9377229488567231
1998	2.322066083767991
1999	3.1794114325807756
2000	2.0614018228324715
2001	2.245369204946499
2002	3.07742751624357
2003	3.027911346222358
2004	4.354746098588693
2005	3.236993221790211
2006	3.581542935840805
2007	2.5041082488872513
2008	3.337200322441248
2009	3.6578937050592044
2010	3.471188729492859
2011	3.506046312240136
2012	3.1123621781946094
2013	3.7091685484012054
2014	4.016103352914686
2015	2.8558794759840245
2016	1.401483909581823
2017	1.1530091224823404
2018	1.113178845141969
2019	1.0152032602169756
2020	0.9111180179969054