Year	% of total merchandise exports
1960	2.954048140043764
1961	2.902804957599478
1962	2.731740770373757
1963	1.9368485648669005
1964	1.699889915298196
1965	1.8582386711941024
1966	2.167111560348246
1967	2.1606834020480528
1968	2.4788396380848443
1969	2.7896883039605176
1970	3.1078900617709855
1971	3.823460670517402
1972	3.360131456190933
1973	2.709078034135387
1974	2.719799646208318
1975	3.5778142930384704
1976	2.3253188630975594
1977	3.719364584172844
1978	4.041828028140824
1979	4.115160843483599
1980	4.301441411316056
1981	3.796289047746035
1982	4.240787948732682
1983	2.7996022904360043
1984	2.377627036550985
1985	2.467057456510854
1986	1.4469816910920057
1987	2.216367688980093
1988	2.8657576388718025
1989	2.872188828114786
1990	3.3353389189534615
1991	2.806685929365253
1992	2.3810669120745263
1993	3.217760904604506
1994	2.849298379612683
1995	3.1940703001792676
1996	2.8592841449166286
1997	2.9193894346577616
1998	3.1332168874026194
1999	3.152200314089134
2000	2.7004292219778887
2001	3.4341640992928615
2002	2.7988040293675893
2003	2.6677799651598657
2004	2.0184931893973364
2005	3.2002888594809416
2006	2.816202064009472
2007	2.77108635274388
2008	3.202110016943131
2009	2.1265790626250003
2010	2.522206432258776
2011	2.3910896328573803
2012	1.943899308194707
2013	3.256330510115536
2014	3.003388479307602
2015	2.8467954466213135
2016	1.878018451259474
2017	2.0366378349989707
2018	1.5319995713279866
2019	1.3741627566416648
2020	2.265166076270371