Year	% of total merchandise exports
1960	7.924468254389222
1961	7.10756738247811
1962	6.387090974469616
1963	6.626979205423952
1964	6.438935912938322
1965	6.219240881817569
1966	6.121641768339064
1967	5.83288194543433
1968	6.032893097433342
1969	6.1808535875261486
1970	6.786268425135756
1971	6.402364806120675
1972	6.4988358556460994
1973	6.656126316671204
1974	6.985084632143455
1975	7.75997219755184
1976	7.503671665521376
1977	7.394154199184359
1978	6.956610264393609
1979	6.652052664038828
1980	6.664102641957566
1981	5.93017535683507
1982	5.7856069139713435
1983	5.160054719562244
1984	5.095913519202049
1985	4.858879342384294
1986	5.004992711175663
1987	5.4609031248489
1988	5.589199652366279
1989	5.291863231054378
1990	4.72178625067916
1991	4.154057316829647
1992	3.831835328093224
1993	2.824382622943813
1994	2.724072327743781
1995	2.504381864243344
1996	2.699174639404305
1997	2.6701504423110225
1998	2.590443723554212
1999	0.26168028650253083
2000	0.18317024880848673
2001	0.21363789919218276
2002	0.30051178948580237
2003	0.24253599896801814
2004	0.3799466096174828
2005	0.2724633471222884
2006	0.20813081465429675
2007	0.2368202031668413
2008	0.1633804446574221
2009	0.17005365268767378
2010	0.15799230533164205
2011	0.2125683456668171
2012	0.17723542085386929
2013	0.1285515277703941
2014	0.14331520206970802
2015	0.11136823339853931
2016	0.0756596232807594
2017	0.04266107232420503
2018	0.031629083592050654
2019	0.07548995716280049
2020	0.03195784069883347