Year	% of total merchandise exports
1975	1.0638297872340425
1978	3.225806451612903
1982	0.2614948790690131
1983	0.09939863823859635
1984	0.18214936245569854
1985	1.5716765312476666
1986	0.05700279313093509
1987	0.6888920983533173
1988	0.6043160307950587
1989	14.594183284850809
1990	0.8996708798213144
1991	2.0017308043079667
1992	7.400892098921914
1993	0.2950727090807876
1994	8.299840475488871
1995	3.133135861779362
1996	2.2811239631264892
1997	0.5321170657622254
1999	3.038055447278284
2000	0.20868048480636248
2002	0.002816934771634619
2003	7.6109637071425835
2004	72.17389079371578
2005	6.5723456160245926
2006	18.22745608317857
2007	8.211732126957926
2008	7.967062682820619
2009	6.98626623478266
2010	17.04811953981848
2011	12.998785139463726
2012	25.813068497560497
2013	16.69237217160468
2014	24.1127497068252
2015	19.591421505218694
2016	45.412162649008984
2017	41.41838003462528
2018	37.360333392831805
2019	19.995190672240597
2020	31.772379631186244