Year	% of total merchandise exports
1971	0.04591895304787051
1981	0.1581464395979197
1985	0.033331232286107015
1986	0.028029140182841653
1987	0.062220949347665803
1988	0.00942139037754624
1989	0.09904635874726382
1990	0.07137258693959045
1991	0.021361742750032962
1992	0.025849933688856613
1993	1.143278990605034
1995	0.009055544446320977
1997	0.02669834870348748
1998	0.3261743718699099
2000	0.4870071612854427
2001	3.62256605317577
2002	0.9209206498628504
2003	5.1626882542996215
2004	1.6108105364857332
2005	3.1328644792477296
2006	3.28338359302175
2007	0.9925871194954718
2008	1.0410898971986433
2009	1.2782340348709091
2010	0.4463065734464723
2011	0.22335690129792707
2012	0.021592922073743106
2013	0.10707705824206633
2014	0.02149564331911859
2015	0.013182110764866828
2016	0.27602616178313344
2017	0.08635316371271341
2018	0.9952675240968829
2019	1.2534626901412143
2020	2.3122429706141334