Year	% of total merchandise exports
1960	2.5525962567889997
1961	2.3621616952564617
1962	2.708687940877113
1963	2.2764575090709176
1964	1.9232753157561198
1965	1.5902717047753805
1966	1.7968036784347676
1967	1.3535208506494167
1968	1.0285209671906386
1969	1.0912783079323516
1970	0.8345429383294132
1971	1.087776914562569
1972	1.4030795630994113
1973	0.6386111651290103
1974	0.4140492786896886
1975	0.3364839803701426
1976	0.4067494263098776
1977	0.48406200638290264
1978	0.4269397434269383
1979	0.30536993616638863
1980	0.4156518268138787
1981	0.7127658991139877
1982	1.6013338074494656
1983	1.4381476016213928
1984	1.2725200345163106
1985	0.9569275773527933
1986	0.7723383735252265
1987	1.362944500870301
1988	0.9142978783960507
1989	0.5437689004970221
1990	0.8994601180939846
1991	0.43767362195723336
1992	1.5990755772150342
1993	2.0560450811726394
1994	1.3599750017241252
1995	1.5942699624735015
1996	2.112586689001376
1997	2.0626285509921507
1998	2.590468126655405
1999	4.175343612460926
2000	4.01872086025024
2001	3.293337351095683
2002	3.3568415185515765
2003	3.257812039141756
2004	3.240509132575747
2005	3.889228871888211
2006	5.3178594790860485
2007	6.235378192831197
2008	7.749819546020056
2009	7.630034693570057
2010	8.59262442770254
2011	11.98348315532667
2012	13.216615100362672
2013	13.908557499810016
2014	14.856770643725795
2015	15.525885097290612
2016	14.526429986903642
2017	15.616641160716025
2018	16.510463125907666
2019	16.509395798431772
2020	15.025978093382955