Year	% of total merchandise exports
1960	5.492529712090471
1961	5.040572734084912
1962	4.974198154335618
1963	4.661467872909698
1964	5.967174147875501
1965	5.970397368382371
1966	5.730573217855588
1967	5.4825133341608785
1968	5.425883285932905
1969	4.792572352898402
1970	5.130347491669475
1971	6.098633845785209
1972	5.5605826007842465
1973	5.31298505433435
1974	6.393769382506472
1975	7.3702132406340395
1976	6.1183664075672
1977	6.564425379732386
1978	6.584125518455157
1979	6.205601006000591
1980	7.118844721426204
1981	10.088495394901045
1982	10.116384780205035
1983	10.192075254067765
1984	9.624707466027587
1985	9.880145205226107
1986	8.911881496317445
1987	8.854974927676766
1988	9.12760331958151
1989	7.645113139519896
1990	7.140887367723021
1991	6.159964473076715
1992	8.07680434783635
1993	8.675259673993937
1994	7.741971327550069
1995	8.60701241101531
1996	8.622405005746865
1997	8.817971195481539
1998	8.426106382438
1999	8.364821370970558
2000	8.859141830287065
2001	9.372549574326124
2002	10.05321861416539
2003	10.883895176686947
2004	11.614847854966628
2005	12.362923542224094
2006	13.226102719139215
2007	14.919918230982123
2008	16.09776589243412
2009	16.700370241024867
2010	17.546903133634714
2011	18.415013135514947
2012	18.88788551939448
2013	19.215361184117164
2014	19.601410283349203
2015	18.66418595703404
2016	18.757839192676094
2017	19.570827863604453
2018	20.13670196412328
2019	20.109895594490844
2020	19.500155536266735