Year	% of total merchandise exports
1962	1.3155102906853384
1963	1.1301563382934638
1964	1.097987023789719
1965	0.6400853447126283
1966	0.1406829517841156
1967	0.07377895824110964
1968	0.1688903901368012
1969	0.10104412260020208
1970	0.1291051399983862
1971	0.060766766103193016
1972	0.13765888129215803
1973	0.03466905497934302
1974	0.011931620964942729
1975	0.016260365983314363
1976	0.05292233415347476
1977	0.0008458447874814971
1978	0.005022248561125787
1979	0.0017419883054518427
1981	0.001040566484394104
1982	0.0028256968874948783
1983	0.044945082727042895
1984	0.0041909743177093815
1985	0.0010789402302152779
1986	0.06468048078944466
1987	0.06468048079228499
1988	0.024343962763101603
1989	0.0051240578754037655
1990	0.020247437840575203
1991	0.07188563165610758
1992	0.0401717306878343
1993	0.17575802584993788
1994	0.08797707602832676
1995	0.4916500809680609
1996	1.246366411960879
1997	1.1714866484905937
1998	0.5890675130283227
1999	0.48747617280880245
2000	0.0716316312672887
2001	0.20612945796028037
2002	0.10571763132602444
2003	0.10514472781565046
2004	0.1166096434385004
2005	0.0407209152108958
2006	0.0344396820687693
2007	0.005466830902386411
2008	0.004889799013239127
2009	0.005893510922955451
2010	0.006468260995877134
2011	0.005085108116244887
2012	0.006389735643987241
2013	0.006598210385453692
2014	0.010983030822898837
2015	0.3227476420162765
2016	0.4616142577408361
2017	0.5575939684592187
2018	0.37182184439867805
2019	0.062349828356999704
2020	0.12441309050117476