Year	% of total merchandise exports
1960	0.4090103754578454
1961	0.466135674830659
1962	0.24837069436248688
1963	0.26157939440193717
1964	0.3194958394380436
1965	0.7111400669046585
1966	0.9167049206032455
1967	0.7159159698912371
1968	0.533174367308695
1969	0.37382399166205604
1970	0.22834349799981357
1971	0.24912456812693348
1972	0.6515711041218495
1973	0.7322450163569851
1974	0.5136759988258155
1975	0.5482693075624714
1976	0.37600736443172417
1977	0.7733228392796672
1978	0.9274790406773499
1979	0.8769824899920401
1980	0.8471032588128197
1981	1.265383242246591
1982	1.5792191921488956
1983	1.6181440831112535
1984	1.868515287261616
1985	1.514970937762642
1986	1.4375638479364565
1987	1.506465409066244
1988	1.561751545533095
1989	1.2811011070567282
1990	1.2878628714176446
1991	1.1017486063660622
1992	1.0835489073634559
1993	1.011643397457796
1994	1.2104638065298603
1995	1.303863463295674
1996	1.163859054199489
1997	1.1745146901865562
1998	1.306365426609712
1999	1.4712840982629725
2000	1.2388781128333093
2001	1.1886236460308173
2002	1.3836019001674877
2003	1.5488979702753487
2004	1.570162068946983
2005	1.7333996732192527
2006	2.0077504798462917
2007	2.322744609929222
2008	2.5590099168673364
2009	2.925943120937345
2010	2.940025703575229
2011	3.0741452676036114
2012	3.143817958933693
2013	3.0804658433203027
2014	3.27827379862494
2015	3.551339315866025
2016	3.8536325620778418
2017	4.044362407959762
2018	4.124112188084723
2019	4.03161908205663
2020	3.605231311962066