Year	% of total merchandise exports
1960	9.080188679245282
1961	3.6337209302325584
1962	10.158875150882459
1963	0.6114083234905857
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0.6997455470737913
1972	2.3985239852398523
1973	29.293260175251824
1981	0.025713367233391432
1982	0.11169721318872647
1983	2.3110302434774592
1984	6.715688623560517
1985	66.85433809730041
1986	64.43196536612197
1987	66.26711105960086
1988	65.65376326275911
1989	68.86834581612197
1990	48.00096172165605
1991	19.397706667422003
1992	19.824655205505746
1993	10.471469023928039
1994	9.360041990338079
1995	9.229092236829322
1996	9.355088984368917
1997	5.59424154042526
1998	0.05970784950312583
1999	1.0913439535666831
2000	0.6575096208412232
2001	2.8647367827031247
2002	1.3524746402718049
2003	0.941155928903147
2004	1.1883311622734398
2005	1.9863464800200865
2006	1.8930786326930755
2007	1.9112042455119667
2008	2.432357530665117
2009	4.882852869095281
2010	0
2011	0
2012	2.3620957669533028E-05
2013	-4.621843517705817E-05
2014	-0.00019574564319049348
2015	0.009544519252968595
2016	0.010445886665908831
2017	0.009240217376034315
2018	0.00016831947619167233
2019	-0.0001355230083582642
2020	0.007901667120597469