Year	% of total merchandise exports
1960	2.1241830065359477
1961	2.8692210829285845
1962	2.8891509433962264
1963	3.316231690088482
1964	2.3171457961128255
1965	2.1058086399396996
1966	2.127044622384363
1967	2.8390617742684627
1968	2.803621970930813
1969	2.9290527602792427
1970	2.469020852777279
1971	2.423152704322696
1972	2.1334016340313466
1973	1.8173668335839135
1974	1.782061167987143
1975	2.58528201351328
1976	2.182112608903441
1977	1.902994133047975
1978	2.278765222501323
1979	2.113136061046567
1980	7.044396452162804
1981	2.789614065062803
1982	3.336371282566285
1983	4.406576388099946
1984	2.94862501424075
1985	2.603925215599041
1986	4.661174912378882
1987	3.5735456061171544
1988	3.215461757986874
1989	2.538673940372329
1990	2.4547497140987873
1991	3.6992737974663603
1992	4.8438388575822495
1993	4.081163186642792
1994	3.3638497261045632
1995	3.292951448883553
1996	3.439199501843868
1997	3.3079547676483703
1998	3.9183948911791724
1999	3.795606279296402
2000	2.9009272202113245
2001	4.3809118162208796
2002	4.7908063215372065
2003	4.632858343535718
2004	3.327186516988871
2005	3.02698234828858
2006	2.6363357663466873
2007	3.373480457930072
2008	3.185154558322229
2009	3.824162686073793
2010	3.3337240860161357
2011	2.7554978363201896
2012	3.6712442849720417
2013	2.9295484406756693
2014	2.5037093869010407
2015	3.1245650013225093
2016	3.5296891145085523
2017	3.2514830325072652
2018	3.219130990920196
2019	3.487506508877711
2020	4.1888514012513