Year	% of total merchandise exports
1960	0.17739932588256166
1961	0.17886421225219853
1962	0.14247551202137132
1963	0.04380604435800052
1965	0.012056189002845738
1966	0.03298301858007568
1967	0.2852502252385658
1968	0.2997406110074021
1969	0.3468872668044948
1970	0.8641707138364575
1971	0.5348393536580784
1972	0.1698458560711383
1973	0.5440341813666179
1974	0.622239527782963
1975	2.716614104644245
1976	0.2209927370035297
1977	0.30386340406927087
1978	0.43609756083109175
1979	0.48475989451220236
1980	0.801924531911499
1981	1.3010639306048213
1982	1.1869186066510435
1983	1.064117620586199
1984	0.09134684096589653
1985	0.7856477302199867
1986	0.32608810002407945
1987	0.36273360306866376
1988	0.1358643114542251
1989	0.5319500299948549
1990	1.0906539853211605
1991	1.0500955204724565
1992	1.4978145013419981
1993	1.3173199733799494
1994	1.297276916891997
1995	1.3983121406217438
1996	1.543875233252417
1997	1.740344217061571
1998	0.4624886415601738
1999	0.8330018458251058
2000	0.6561754955855458
2001	0.636909314859664
2002	0.6510193442106929
2003	0.8797945193349548
2004	0.803543054850582
2005	0.9729118790840016
2006	1.0936684400447605
2007	1.2792013938563596
2008	1.7486317917306125
2009	1.0970682387994426
2010	3.164592716451059
2011	2.399145621836234
2012	1.701477592438742
2013	8.121422871259371
2014	9.05687160585542
2015	3.6650380098887685
2016	4.325080969458616
2017	4.691177211590145
2018	7.6317173472624305
2019	2.9857079130835023
2020	2.386381158920514