Year	% of total merchandise exports
1960	0.05648144786157204
1961	0.02993003853492461
1962	0.5529918138900557
1963	0.47758757797535645
1964	0.3708642661813426
1965	0.2731621949791445
1966	0.30438978624740803
1967	0.5449488031342173
1968	0.5128487277102861
1969	0.4263370187424984
1970	0.591035786354431
1971	0.6857903672342254
1972	0.03359645306108155
1973	0.02363087605614453
1974	0.022232143173973488
1975	0.05813809344338763
1976	0.01811301460140554
1977	0.06016042692520956
1978	0.013429126117548134
1979	0.008521726781179122
1980	0.0061523775933732955
1981	3.3704611784225116
1982	3.275896620173506
1983	2.683439138571733
1984	2.366318431760982
1985	2.6885292853152483
1986	2.573549686613613
1987	3.3135720154284716
1988	4.068811942840337
1989	4.136795033804746
1990	2.3257598654867384
1991	0.022395505291131882
1992	0.12770835643007686
1993	2.5505512752553727
1994	0.5937751362957852
1995	0.9174406706001779
1996	0.5498361871112272
1997	0.4226573157360394
1998	0.6073818380565366
1999	0.5616270378678712
2000	0.3208268461821811
2001	0.31125449920990295
2002	0.46207060800822564
2003	0.4773737895171419
2004	0.6615129996230575
2005	0.5581324402981906
2006	0.40835164653525263
2007	0.6001329989866532
2008	0.6746488224337761
2009	0.6774336851150796
2010	0.6798734575936772
2011	0.22130127290173474
2012	0.23972892245000318
2013	0.242243054756956
2014	0.3403236158540289
2015	0.527358171285812
2016	1.0579878449409672
2017	1.2781283852910825
2018	1.2156309038921125
2019	1.4973676136721514
2020	4.421153140798514