Year	% of total merchandise exports
1960	2.6486411918885366
1961	2.82740188493459
1962	2.725166916473634
1963	2.296195652173913
1964	2.431101330818401
1965	3.571050121860761
1966	4.271597067261715
1967	5.110597079658811
1968	4.653622421998942
1969	6.146801574155158
1970	4.651328203776458
1971	4.692046185415454
1972	5.8338635969225425
1973	6.801663387067068
1974	8.314161699041229
1975	9.550425590156028
1976	9.526063471943504
1977	12.078191857330586
1978	11.236407356552487
1979	11.902142419690158
1980	12.843339658334111
1981	15.048816864938038
1982	15.716813710131602
1983	14.336298887283602
1984	12.634727157470863
1985	9.321544635764322
1986	6.7998176846614165
1987	6.110838175420681
1988	5.903340313987976
1989	4.7856414108912535
1990	4.280743154295893
1991	4.071645633258997
1992	4.279273197598157
1993	4.715276338984671
1994	4.11565594924062
1995	4.147992957177469
1996	3.501451587283836
1997	3.5507269097172265
1998	3.778322972135569
1999	3.831918320890484
2000	3.5508700725356155
2001	3.7524449033663165
2002	3.959347943316676
2003	4.008198816992293
2004	4.361835782157938
2005	4.196722182231778
2006	4.1526929066100156
2007	4.658773862717008
2008	5.561275134094055
2009	5.927115970121694
2010	5.635980776398981
2011	5.697622807286586
2012	6.95970144340922
2013	7.603677044794253
2014	7.493286054114681
2015	7.590929741066272
2016	7.416547870032863
2017	7.067808066509978
2018	7.135684586767564
2019	6.695308863594178
2020	6.290341501555298