Year	% of total merchandise exports
1960	2.8165278735479764
1961	3.0034730714670057
1962	2.885652642934196
1963	2.84426805572781
1964	2.6262091898428053
1965	2.406795658329401
1966	2.446222654942648
1967	2.2493371725062006
1968	2.349862945427361
1969	2.866139015290388
1970	2.5969743987587277
1971	2.5404277516953573
1972	2.578579743888242
1973	2.7066362322786004
1974	3.430534607005195
1975	4.6499594547631
1976	5.706913510381718
1977	6.239421099864817
1978	6.091700000424184
1979	6.188158635668892
1980	6.19110755746283
1981	7.185524646493787
1982	8.853912368181277
1983	7.62751612272816
1984	6.545643073256417
1985	5.578510891031387
1986	3.9463777479935707
1987	3.9951823964061384
1988	3.624871612546417
1989	3.0320991016218457
1990	2.7985719544475476
1991	3.0825416464115745
1992	3.30821789714319
1993	3.6860872737382713
1994	3.0457350825363263
1995	3.246766442119768
1996	2.9318545855269758
1997	3.1075579948611827
1998	2.932409394305753
1999	2.6085786274495146
2000	2.6978033195768134
2001	2.8763383570131658
2002	3.370048365575252
2003	3.142549544685771
2004	3.120349689784885
2005	3.0686280897072207
2006	3.2107706440035217
2007	3.481199914425428
2008	4.093166900276539
2009	4.400392576459685
2010	4.085111031036458
2011	4.014392736159958
2012	4.652650073929463
2013	5.936519564628056
2014	5.73965349166814
2015	5.541011705809088
2016	4.151406318136851
2017	3.7398043086902732
2018	4.065584411124953
2019	3.570665119555309
2020	3.2377992917400453