Year	% of total merchandise exports
1960	21.46722269717012
1961	20.722674737744324
1962	19.165287121030037
1963	18.72817212384404
1964	18.518809651337307
1965	18.02293764430309
1966	17.963164850554904
1967	17.572186224543042
1968	16.75199495259511
1969	15.79832235859458
1970	15.455356035978957
1971	15.319461017869513
1972	14.295974447440377
1973	14.547974776895098
1974	17.365201181916884
1975	19.552184617489317
1976	17.069302978615664
1977	16.918110895064345
1978	16.888020054651882
1979	15.681476933995361
1980	17.66655899746514
1981	19.1067937450292
1982	17.560506825426383
1983	16.006659526704702
1984	15.2378488801443
1985	15.00406880628299
1986	13.106252135776236
1987	12.218490503001938
1988	12.428789239330545
1989	12.510864903844102
1990	12.495877556736838
1991	13.45784712228857
1992	14.732771654692064
1993	17.30345977064595
1994	17.332776707651508
1995	17.446185421533812
1996	18.076244167910907
1997	18.258575426210903
1998	16.99676183255649
1999	16.039712825867873
2000	17.123461664128463
2001	17.48027010805441
2002	17.882101700932665
2003	18.584397769576377
2004	19.41554722414057
2005	20.202764530457703
2006	20.969760979551772
2007	21.735674379744825
2008	22.91289105088136
2009	24.296073750507805
2010	26.412958930230168
2011	26.842801032975732
2012	27.839859568021314
2013	28.104436979119125
2014	27.77015409422653
2015	27.827428392333942
2016	27.21405454749735
2017	28.32108748153245
2018	28.085993845696578
2019	27.72803095330033
2020	27.703553435778677