Year	% of total merchandise exports
1960	3.2362796621770418
1961	3.2906764168190126
1962	3.964084078451043
1963	4.436651065614475
1964	8.504087493190516
1965	9.922619230927157
1966	6.908836640304646
1967	5.827359763024987
1968	6.982428781257366
1969	7.756153229362224
1970	7.7616498356565184
1971	7.696293691610816
1972	8.720113377587293
1973	8.391996406264784
1974	6.732479050115479
1975	5.065343313024242
1976	3.948902921732272
1977	4.027321474246953
1978	3.9741272500736695
1979	3.53921090790749
1980	5.3370683689555385
1981	5.996692309806422
1982	6.122876138661787
1983	6.188445351728953
1984	5.931828869261231
1985	5.375381189331727
1986	6.028163496198976
1987	6.61345736784037
1988	6.249525204749679
1989	7.276181879716415
1990	7.803075104607784
1991	8.038403879482086
1992	9.221976529818445
1993	9.884800524956434
1994	10.623420057593302
1995	11.073794810700429
1996	11.049514624743463
1997	11.50871521848195
1998	12.071972580132906
1999	12.332355898826203
2000	14.389759859555145
2001	13.314358468020046
2002	15.064166445165048
2003	14.162364897173047
2004	14.141832952449077
2005	13.592888654314224
2006	13.549589134738827
2007	13.664272063360784
2008	12.827578036903006
2009	16.696295881853917
2010	17.342106902389787
2011	17.52786805617902
2012	18.668337499884597
2013	19.656255531022946
2014	19.98150528697882
2015	21.848011562520362
2016	22.733530401861067
2017	20.294348715598094
2018	18.97161187916044
2019	19.726426343986773
2020	20.30803179082997