Year	% of total merchandise exports
1960	0.7320915577796312
1961	0.47707944409873476
1962	0.6081525312294543
1963	0.5936675461741424
1964	0.10643581920102178
1965	0.19436997319034852
1966	0.10044572791763451
1967	0.33460803059273425
1968	0.3955029845827077
1969	0.6196063823182467
1970	0.5641685284228105
1971	0.767886702225492
1972	0.6627089646074248
1973	1.2732869837694925
1974	3.3592835699384316
1975	5.59756562971769
1976	3.2655469095162335
1977	3.697648205852324
1978	2.3983890973508837
1979	3.677623988557365
1980	2.1873197015784642
1981	2.597236340081822
1982	5.596369752132469
1983	2.888318848347946
1984	3.398253447467745
1985	3.452575913673692
1986	4.348581194385782
1987	1.5400773890853403
1988	2.5134213680218465
1989	1.4507468548070364
1990	2.769970231565551
1991	3.0773577836121593
1992	3.194604277245704
1993	2.720874885073711
1994	2.4344091448076814
1995	1.8336214214597844
1996	4.007368534502068
1997	3.5753741822012177
1998	3.164835179593231
1999	4.518245453557033
2000	4.102987446714478
2001	4.922963710708748
2002	5.201911808103021
2003	5.441516324978459
2004	6.297798775230547
2005	5.689686756220371
2006	4.854930596600562
2007	5.323642563490183
2008	6.170282000337198
2009	5.470248009992802
2010	5.398134202695833
2011	7.460291857095706
2012	6.828661104970181
2013	7.990460208621329
2014	8.297513149197302
2015	7.142998198609045
2016	8.953449063899734
2017	9.040893548488684
2018	8.935304606344687
2019	8.82029106509252
2020	9.95603409529039