Year	% of total merchandise exports
1960	6.369060773480663
1961	6.3944817300522
1962	5.5643879173290935
1963	6.0519091589717995
1964	4.607918389580806
1965	4.713590245234087
1966	3.962214641826292
1967	3.585965223126178
1968	3.618675039892932
1969	4.5268478189664005
1970	4.499400427521246
1971	4.501608172232982
1972	4.913173993996276
1973	4.594228476439142
1974	3.3833241339905085
1975	2.1967314309618735
1976	1.6615123203757667
1977	1.6311472177687332
1978	1.937017448424979
1979	1.4125028798761556
1980	1.101199341537979
1981	3.0625507260887344
1982	3.1153941402780245
1983	3.028280619290612
1984	3.312752123790759
1985	3.029174246201202
1986	3.496078911543595
1987	3.565065949597762
1988	3.817030170470084
1989	4.178225692254712
1990	3.961343002773829
1991	4.63219120152349
1992	4.57626631352288
1993	4.965252785371317
1994	5.623515973909232
1995	6.065194853844253
1996	4.370896501655395
1997	4.271774468184351
1998	4.889117580005388
1999	3.236073133097464
2000	4.416815970057114
2001	5.670362646767661
2002	6.336590519529575
2003	5.866704655781542
2004	6.802897909946718
2005	4.065549995649802
2006	4.103406518414678
2007	6.867419780903543
2008	9.514348674034567
2009	11.23540329534276
2010	8.270501033218975
2011	4.800122504497577
2012	4.534537068982069
2013	5.244891044746122
2014	5.129092155982186
2015	5.537908116649812
2016	4.240654496186256
2017	3.5709923962208943
2018	3.2253047010002347
2019	4.4927087898678675
2020	5.603412009373394