Year	% of merchandise exports
1970	13.114566138401267
1971	11.82396300085825
1972	9.981058746848275
1973	14.51026576930015
1974	8.484661159546622
1975	9.26129853119493
1976	11.028653313551855
1977	8.965102584067566
1978	7.787294050113287
1979	8.935970425912677
1980	9.393627850156717
1981	9.350121468735619
1982	13.059782431115751
1983	9.785772961337264
1984	9.922597195159284
1985	9.385363891419717
1986	11.842950543497293
1987	12.781467870908962
2002	16.02349770981127
2003	17.119431477890583
2004	20.0884594761666
2005	27.446986667034317
2006	22.780368440442018
2007	22.51456945662806
2008	19.439235868936127
2009	19.578282740480613
2010	21.18354033308945
2011	18.08751451122122
2012	16.896739416683946
2013	19.323288966397342
2014	23.83466406064046
2015	17.419903728642407
2016	24.36402434750612
2017	20.65101779894993
2018	26.64332817757834