Year	% of total merchandise exports
1960	0.9115770282588878
1961	0.26200873362445415
1962	0.5751848808545604
1963	0.9298998569384835
1964	1.0245901639344261
1965	1.627742392073602
1966	2.094240837696335
1967	2.601330913490623
1968	1.1134794642573091
1969	1.1615589459900837
1970	1.0905960011479958
1971	1.2335711187312202
1972	1.731744950583133
1973	2.3758113068549873
1974	1.560111246190484
1975	1.250719931888183
1976	0.7478515778804605
1977	0.6229442838632513
1978	0.9083653150352894
1979	1.1516647301429217
1980	1.3593983791871718
1981	0.8849202864010655
1982	0.26105770150422797
1983	0.4301437289381905
1984	0.6053557113531999
1985	0.6053557113251334
1986	0.6053557113600833
1987	1.1839896835637072
1988	1.3104177789617584
1989	1.3104177791952698
1990	0.9689097771641897
1991	1.651254364892642
1992	0.9703227586496453
1993	1.3959747096972945
1994	0.9942879226328065
1995	0.8440287330253128
1996	0.7823165245187924
1997	0.7679169192097314
1998	0.6145715802515976
1999	1.8131591963412654
2000	0.9908579546786691
2001	1.0030169922055123
2002	0.9006549704415713
2003	1.0400184865819906
2004	1.6982735603951953
2005	1.9745569390144924
2006	1.5218159280720875
2007	1.4401431091123118
2008	2.2848835971987747
2009	1.4256579476146527
2010	1.4797632296876362
2011	1.920025492070467
2012	2.332652176253767
2013	1.7443136893929143
2014	2.092884090518993
2015	2.5199992512258818
2016	3.342387660562611
2017	3.4118238447858897
2018	3.997916005751174
2019	4.24412880353495
2020	3.483510964281041