Year	% of total merchandise exports
1960	13.924050632911392
1961	13.060538116591927
1962	14.607237422771405
1963	16.024789729969015
1964	11.405295315682281
1965	16.350589441312145
1966	10.804144055254078
1967	9.29472209248015
1968	14.593198450279809
1969	10.062741212275128
1970	21.972517180950337
1971	21.937848343627007
1972	10.935260241590035
1973	4.982390576554049
1974	12.332673063859666
1975	11.046100138138835
1976	11.57958551803029
1977	11.337530289783608
1978	17.74448859795208
1979	17.120191786024304
1980	11.407898570232664
1981	12.15971103535259
1982	5.822555750705201
1983	11.215704134667348
1984	12.489138569603632
1985	12.174838314508305
1986	24.30861819643704
1987	17.122708285887573
1988	15.256463715308918
1989	15.383828915665445
1990	10.938104779164927
1991	12.429295374232892
1992	2.6599778612161806
1993	2.0363401834834822
1994	0.7908259455183984
1995	0.873471058648353
1996	0.8379172670204195
1997	0.15479459357514855
1998	0.16601577870386416
1999	0.13470247571031235
2000	0.02692057825876828
2001	0.02683878767561316
2002	0.02654029837353881
2003	1.6996986565579
2004	0.3466532892899561
2005	0.31134059856051494
2006	0.5884486845774858
2007	0.029000197105048395
2008	0.2337260215029616
2009	0.5402862140495626
2010	0.8817474082483049
2011	4.5040887759433765
2012	5.135023492037076
2013	16.37646949766709
2014	5.769721903383376
2015	7.76614362973846
2016	2.000095431376759
2017	1.0223178551247536
2018	0.5510897282038142
2019	0.4196187459392085
2020	0.4196188019598371