Year	% of total merchandise exports
1960	0.5015673981191223
1961	0.2881844380403458
1962	0.36755053819900235
1963	0.5708072845882034
1964	0.6327573618885374
1965	1.1228533685601056
1966	1.1210762331838564
1967	0.7272727272727273
1968	1.109094575519258
1969	0.9032498370425551
1970	0.8173460891434009
1971	0.6768839690820685
1972	0.5940638450502151
1973	0.5529729893962873
1974	0.5457061542076815
1975	0.4961238096597804
1976	0.3566035425679536
1977	0.8061801438914594
1978	0.6288483640765455
1979	0.3537339070994705
1980	0.7564057684519765
1981	1.0554794931728717
1982	0.9465092581078891
1983	1.4520604087941495
1984	1.466102147759869
1985	0.9183494098311911
1986	0.5246648870316275
1987	0.1884067141244354
1988	0.31460245134930104
1989	0.23073048384637634
1990	0.28560054025296056
1991	1.4151467874948844
1992	10.275601922643204
1993	11.571618552633355
1994	28.027443510564932
1995	28.669165993961183
1996	27.885547880941676
1997	28.511402537827813
1998	26.34556069587724
1999	20.904966732622796
2000	20.97996748890877
2001	20.165931751920777
2002	20.483983562032684
2003	21.222297735670374
2004	19.3191084190677
2005	20.195569317793932
2006	20.429475723425597
2007	24.392891314382524
2008	23.380064633020492
2009	17.94269764628435
2010	17.93009548773603
2011	19.408006590325467
2012	23.015536831606678
2013	22.099787822367556
2014	20.52404110859092
2015	20.12736046847371
2016	19.470565149157213
2017	20.072228187209976
2018	18.7983873598695
2019	19.99877725251066
2020	20.76569909670049