Year	% of total merchandise exports
1960	0.31545741324921134
1962	1.2704174228675136
1963	6.235565819861432
1964	9.536082474226804
1965	14.294049008168027
1966	9.433962264150944
1967	7.357545397620538
1968	5.649593317212574
1969	5.6537102473498235
1970	4.857482185273159
1971	5.923994038748138
1972	4.973596954439396
1973	3.8386467143786596
1974	4.654547082792281
1975	5.658929976396538
1976	7.668775277403298
1977	8.731003871378668
1978	9.923451966903299
1979	11.201633391415385
1980	14.571112372629635
1981	14.611316142074704
1982	13.023718221843488
1983	11.327388764191944
1984	12.12127426151685
1985	11.19371696636966
1986	8.42524210465818
1987	7.473449503862371
1988	7.94851773512299
1989	9.423585414134127
1990	10.830102236249104
1991	17.663376490207735
1992	20.37802278840493
1993	25.763027873590005
1994	25.60959728497859
1995	25.248395422671937
1996	29.30217358150749
1997	31.148209825145713
1998	30.217373835603034
1999	28.695507163801608
2000	28.838191055819816
2001	31.34815745829897
2002	33.62181250563553
2003	36.755471769618694
2004	38.37699186190861
2005	41.0703728883385
2006	41.85328702383039
2007	44.06680046684787
2008	45.82923243934013
2009	46.590337482382736
2010	49.568735940126594
2011	49.88831164753648
2012	50.50937342709037
2013	52.098667321025246
2014	51.10460268516498
2015	50.5061613626397
2016	51.06363407797006
2017	53.48958162077911
2018	53.680746955298595
2019	53.84102749344824
2020	53.43266965377735