Year	% of total merchandise exports
1960	2.555795985567544
1961	2.392967507841548
1962	1.9971597298673012
1963	1.9044338260561307
1964	1.8183749634025137
1965	1.7824862134454513
1966	1.5401358241648746
1967	1.3552359010037207
1968	1.051042042457615
1969	0.913945178298661
1970	0.7648779928219076
1971	0.825747156855664
1972	0.7281228703479712
1973	0.6519963943482209
1974	0.6415896682676134
1975	0.7424229144105997
1976	0.6388859295800839
1977	0.6644613612736255
1978	0.7589962704778158
1979	0.7549361411387835
1980	0.7797242858717387
1981	0.8711992473403842
1982	0.8859912101349664
1983	0.8438205957427886
1984	0.850012590381425
1985	0.8955896719123536
1986	0.9636312834024725
1987	0.9184420440107464
1988	0.859740582105459
1989	0.825563844753217
1990	0.7036676276780873
1991	0.6359227127989693
1992	0.6551320709765134
1993	0.7247305454039128
1994	0.7161867491409839
1995	0.7810445197106023
1996	0.7506274543980946
1997	0.7450741438570777
1998	0.6326499767637879
1999	0.6934388153346901
2000	0.7161774956149398
2001	0.6402298968896338
2002	0.7014465565687061
2003	0.7436522484497718
2004	0.7980681431625329
2005	0.8863378287128708
2006	0.9016142202528825
2007	0.9635253848640536
2008	1.0123886348701119
2009	1.1144452069695867
2010	1.1520545576196244
2011	1.1369744992791186
2012	1.5100798541289273
2013	1.328761609634429
2014	1.2735137539193415
2015	1.3761853114683082
2016	1.2951659638209747
2017	1.3862084325968183
2018	1.3534388503333512
2019	1.3140530832006903
2020	1.1420640993934135