Year	% of total merchandise exports
1960	4.24646128226478
1961	8.17391304347826
1963	7.37597911227154
1964	5.002689618074233
1965	9.966405375139978
1966	3.303143313798615
1967	2.6717557251908395
1968	3.624518473427168
1969	1.885577793958337
1970	0.9839071896501702
1971	0.6014714569571987
1972	2.813504255394286
1973	2.936087815219458
1974	1.758677948790087
1975	1.1307661884730162
1976	0.5516526003111887
1977	0.2460473118888645
1978	0.0182087327733586
1979	0.18836257815426283
1981	0.4214100566203766
1982	0.05101949710132726
1983	0.19244827564195466
1984	0.011820670989546398
1985	0.1644028248092785
1986	0.004289724794497813
1987	0.0510860265947615
1988	6.298969442605464
1989	0.02605880807162376
1990	0.47882743520344895
1991	0.5915838182971987
1992	3.1408023579540334
1993	2.498868489653978
1994	0.3321917409768489
1995	0.5275323560756157
1996	0.4851562239951859
1997	0.8780583536916787
1998	0.4716380588607458
1999	0.7807357303817251
2000	0.22439251829059403
2001	0.49441559030472
2002	0.2943958624113514
2003	0.31696404367594816
2004	0.9787851880863986
2005	0.8775236669386223
2006	1.1856463755864755
2007	1.7064854016620385
2008	1.4092740195242195
2009	1.6586313128646206
2010	2.19175602462714
2011	1.864264418393056
2012	1.8680567582248404
2013	2.3027618020200964
2014	4.214215813122894
2015	4.063486056111784
2016	2.8695974010657306
2017	2.4475899989212757
2018	3.148731751060935
2019	3.228457198702248
2020	2.783870319395745