Year	% of total merchandise exports
1970	31.456702568164456
1971	34.09262889300389
1972	33.55353149138082
1973	36.98884642771633
1974	38.838131087330666
1975	35.07952439026762
1976	37.013510422377706
1977	35.94628000795755
1978	35.64916795321522
1979	35.44799508316706
1980	38.338464576206746
1981	33.77522778116125
1982	37.00149190585406
1983	37.89905489157933
1984	38.660135630233974
1985	37.56289693506653
1986	35.74162497132194
1987	42.32554115207236
1988	48.09056901929409
1989	51.306255666822395
1990	66.4088248416234
1991	73.92057354943816
1992	74.272976676223
1993	80.01913427038862
1994	81.9139321456201
1995	82.19263939708075
1996	79.7547682541677
1997	79.85552482235218
1998	84.7766856010193
1999	88.90444689993726
2000	89.14601336057397
2001	88.12084245030668
2002	88.70056437608199
2003	89.08441784047021
2004	87.24471713593314
2005	86.03399467602418
2006	85.72386550371519
2007	85.05069079741057
2008	84.33997078664164
2009	86.62917912679208
2010	85.6656108204727
2011	85.38070374322484
2012	83.39452703386175
2013	83.125942743084
2014	85.5020819392689
2015	87.21318245515357
2016	87.33106035708504
2017	87.28694241095049
2018	87.87851011989225
2019	87.45869853523133
2020	87.04309252524358