Year	% of total merchandise exports
1960	0.7172396152487455
1961	0.7289232228574953
1962	0.7476102128686177
1963	0.7645330085786253
1964	0.6572729615946387
1965	0.6249397645895401
1966	0.7774105399347988
1967	0.7438315189951925
1968	0.6718705079572773
1969	0.625470882053781
1970	0.5926804543536159
1971	0.5684762872791608
1972	0.5952030407513069
1973	0.6032861023575108
1974	0.708785513730362
1975	0.81222273596664
1976	0.7597454615055643
1977	0.6327814331760735
1978	0.4851150310983899
1979	0.4480424156328965
1980	0.4533012381246627
1981	0.4907468033685907
1982	0.5060483149820496
1983	0.5269760272346519
1984	0.572238050704946
1985	0.674664218006522
1986	0.6439040312527372
1987	0.679359040744826
1988	0.5934258058395128
1989	0.5566084460222182
1990	0.6742485040087245
1991	0.6553997988630851
1992	1.0224945544607698
1993	1.959274867402801
1994	1.9309223815154324
1995	2.1643031923465594
1996	2.4537819211036043
1997	2.5837674718395838
1998	2.379916145315431
1999	1.8023467498585448
2000	1.9561386133840064
2001	2.030847039257566
2002	2.240837510316117
2003	2.52073103605325
2004	2.8999982299807887
2005	3.1507879560472367
2006	3.5335997234879657
2007	4.034395741549137
2008	4.455995256036404
2009	3.6023590207183194
2010	3.852922663481422
2011	4.323933094974344
2012	4.4326934567050085
2013	4.445707508124175
2014	3.997232063400541
2015	3.23669797342266
2016	3.2462709258818063
2017	3.454317304205148
2018	3.3208744921450393
2019	3.4047715897070465
2020	3.5353173412620156