Year	% of total merchandise exports
1970	81.25
1971	75
1972	83.33333333333334
1973	89.47368421052632
1974	94.73684210526315
1975	95.65217391304348
1976	73.33333333333333
1977	55.55555555555556
1978	70
1979	62.5
1980	81.57894736842105
1981	82.75862068965517
1982	75.67567567567568
1983	58.06451612903226
1984	46.15384615384615
1985	26.53061224489796
1986	59.71183479987482
1987	59.27919288157981
1988	48.05979194066179
1989	40.676034943331985
1990	93.10575236950363
1991	82.17419651357466
1992	85.27594592102179
1993	68.32919120587604
1994	76.47749575010491
1995	88.12854045762745
1996	87.10617450471165
1997	99.30739647260413
1998	99.8210262588035
1999	99.75458090892528
2000	76.59585988567244
2001	97.50578071567115
2002	93.05101919842672
2003	98.41278262402422
2004	97.64918766185745
2005	86.84250694140876
2006	80.25877513545734
2007	83.95582922161641
2008	82.7055657609319
2009	97.32720975677506
2010	94.88116734465926
2011	94.36835919222953
2012	72.3598499648842
2013	76.48703401687203
2014	90.892823882719
2015	98.95961841505022
2016	98.45278794362379
2017	95.07595324021824
2018	95.32778873684126
2019	95.74170255998592
2020	93.45772001564198