Year	% of total merchandise exports
1960	0.09319664492078285
1961	0.6538618716796076
1962	0.07199424046076314
1964	0.027240533914464723
1965	1.4820042342978124
1966	1.5390765540675595
1967	1.969642211781713
1968	2.625
1969	2.7654348246074023
1970	2.8671221309587778
1971	3.4301944505134365
1972	3.8854467611124646
1973	2.528444139821796
1974	3.4599762099227647
1975	6.18320846687346
1976	5.0405554796477325
1977	3.352981058381966
1978	2.4748589210238996
1979	0.06149926420523183
1980	0.048707448631681485
1981	0.2767348809334955
1982	0.4861071705536325
1983	0.13898676689374365
1984	0.2547682985609034
1985	0.11926722218688378
1986	0.09776536312849163
1987	0.027296463327794923
1988	0.02547692809391815
1989	0.040563563103383
1990	0.052478134110787174
1991	0.04137752683074006
1992	0.04593653102629866
1993	0.06279933198073234
1994	0.11739802187374541
1995	0.15616866215512754
1996	0.3250105714482392
1997	0.35405279812352014
1998	0.3809865501497038
1999	0.3217902392878743
2000	0.33279330151637176
2001	0.4210403103924316
2002	0.34560689587406357
2003	0.38252099551328755
2004	0.4441825328009719
2005	0.5196852246127063
2006	0.5895327247741596
2007	0.7773732557687574
2008	0.7290769592108354
2009	0.8001140324950686
2010	0.5917980251715307
2011	0.6526852273098961
2012	0.6072144098293722
2013	0.4071597640245587
2014	0.38241999199484883
2015	0.35554155732653336
2016	0.23904248661382027
2017	0.25742834910949786
2018	0.2964638686721123
2019	0.36078014172148604
2020	0.2859621370617952