Year	% of total merchandise exports
1960	2.4282603072830384
1961	2.4892907250907608
1962	2.1163493556859914
1963	2.157536933224464
1964	2.1566552754358304
1965	2.4121681119505554
1966	2.2372577422422846
1967	2.4236425012129947
1968	2.407398087694585
1969	2.347737016137971
1970	2.388900609273492
1971	2.7255485608790178
1972	2.40448162054819
1973	2.489824190274366
1974	2.7989345294275583
1975	3.2080226352700274
1976	2.739902534356612
1977	2.8083971797815757
1978	2.915819667492089
1979	2.6950600127730007
1980	2.9860239780737947
1981	4.479394739575728
1982	4.943042263270174
1983	4.720199851671323
1984	4.5428913422040305
1985	4.29151572848091
1986	4.520420481932498
1987	4.4235018040318055
1988	4.258098860396943
1989	3.5139792109154078
1990	3.3271700451816613
1991	3.466412193354503
1992	3.4559446763767125
1993	3.4625517161930595
1994	3.15819948165086
1995	3.051595209886275
1996	2.9056269833875317
1997	2.8204644502270524
1998	3.00497032938077
1999	2.884610588897178
2000	2.7797839572924694
2001	3.250322411924088
2002	3.589848389530033
2003	3.416561477183491
2004	3.607383131829163
2005	3.4205240906553267
2006	3.549315479225272
2007	4.239833600716938
2008	5.096853820903772
2009	5.488822809188638
2010	5.1328545554695415
2011	4.571623375628864
2012	5.219271938641946
2013	5.168468803243385
2014	5.367971993645989
2015	5.499404846997559
2016	5.446841335286434
2017	5.071127201255648
2018	4.684240437544923
2019	5.127548374747634
2020	4.9595997192526715