Year	% of total merchandise exports
1960	2.209944751381215
1961	1.5566741237882178
1962	1.5421303656597773
1963	1.8259712170368523
1964	4.5559214598757025
1965	3.2280813503799086
1966	2.6014919218802715
1967	2.914314494629583
1968	3.2775504696027675
1969	0.9387960096550357
1970	0.9371973501898251
1971	0.9876952173863803
1972	1.1055839257481113
1973	0.6029631085718192
1974	0.4334138622539407
1975	0.1362754025767976
1976	0.2710563839487434
1977	0.25457822437699507
1978	0.4561183768439241
1979	0.369488483326821
1980	0.3843954952836351
1981	4.173039562364607
1982	3.258936691977362
1983	2.968719312541354
1984	2.6037196279704746
1985	2.8627989057368746
1986	2.163874997573435
1987	2.1461672221578234
1988	2.489956339387685
1989	1.7537048209637685
1990	2.4009000289906886
1991	2.4232634522197603
1992	2.0402186293044475
1993	2.0636966069060882
1994	2.6025267644683794
1995	2.7682888744395324
1996	2.1756771045490146
1997	2.5649759764176836
1998	2.645477449911582
1999	3.019853656897744
2000	2.4413949200463123
2001	2.3343618315387564
2002	2.6484346840728477
2003	2.2326111421394352
2004	2.3480972867196503
2005	2.921842522336616
2006	6.984860991167305
2007	7.49074947555407
2008	7.485554814119134
2009	8.266924412899591
2010	7.0524981459802545
2011	10.054968967791263
2012	9.249612974772576
2013	9.646667290127308
2014	10.013036889920125
2015	10.180136746304164
2016	10.737855849364474
2017	11.823831327789213
2018	13.695676074451168
2019	11.197203669989937
2020	10.891132959968676