Year	% of total merchandise exports
1960	30.26052104208417
1961	42.13483146067416
1962	51.103565365025474
1963	45.07845934379458
1964	44.252873563218394
1965	37.55395683453238
1966	46.787709497206706
1967	37.277696628367494
1968	51.3235027918181
1969	40.8626837965903
1970	40.803395160241635
1971	41.471471471471475
1972	31.44776923138749
1973	32.380389394777886
1974	41.54977228366948
1975	39.89086591271941
1976	30.021942075612664
1977	38.9184286749889
1978	43.718141152342874
1979	60.01655115340851
1980	64.50018941823248
1981	66.55879721116975
1982	7.574210040217653
1983	7.796413593092076
1984	13.10362742006983
1985	25.256450076808996
1986	5.360960059553991
1987	14.077950784517643
1988	32.17103756905985
1989	33.527845556956116
1990	21.469185894347063
1991	10.637887157430887
1992	6.227527969791623
1993	1.0660636277724234
1994	28.878699757751058
1995	9.235717748456427
1996	10.251650785350293
1997	3.0586766996873406E-08
1998	0.0014918799326538903
1999	-1.1984877113352804E-08
2000	0
2001	0
2002	0
2003	6.535752312018776E-05
2004	0.0001289910861658369
2005	3.338624404929232E-05
2006	0
2007	0
2008	0
2009	-7.387033145663521E-15
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	6.309087483893103E-05
2020	0