Year	% of total merchandise exports
1960	80.418410041841
1961	79.78241160471443
1962	84.78824546240277
1963	80.3030303030303
1964	76.31987577639751
1965	69.14095079232693
1966	71.46912704045423
1967	69.23076923076923
1968	67.89968652037618
1969	70.4291695743196
1970	70.16370261597868
1971	71.75312729948492
1972	81.65792775115
1973	77.97410653445804
1974	74.8971237862767
1975	76.04261582673301
1976	82.53915869107156
1977	81.18252817861237
1978	80.37711383651197
1979	84.36752308758749
1980	84.849298756877
1981	79.83569494786317
1982	80.0301576699658
1983	81.5581037947748
1984	62.71423655993974
1985	78.13222109252241
1986	71.7232967617374
1987	76.19145757122985
1988	72.3414000558324
1989	72.19690797716704
1990	72.60516529367015
1991	66.92424095331162
1992	73.48098577373183
1993	75.39808014538282
1994	77.66172488288112
1995	77.42454448037387
1996	76.87120601319614
1997	81.11629165078496
1998	83.62632578873995
1999	84.11622613884218
2000	81.4452143680056
2001	82.92392281909736
2002	82.8326684997665
2003	84.70912068212164
2004	88.6376043791122
2005	86.03050064497721
2006	85.33710487595005
2007	85.45607795157166
2008	80.04935326764621
2009	80.34474789984247
2010	81.60666063831115
2011	84.00692757254572
2012	82.87393116853849
2013	82.77189102705518
2014	82.66318438608343
2015	83.32982801294564
2016	82.65384505105942
2017	80.59520318832999
2018	79.55516222647253
2019	78.45425512000573
2020	73.9258936791562