Year	% of total merchandise exports
1977	0.0010855052484178762
1981	0.18812862491740695
1982	0.2224247234388626
1983	3.547622019722881
1984	5.125157320654454
1985	1.117236706346151
1986	1.2520925936616059
1987	1.5703529151862148
1988	4.6835839598997495
1989	8.27461645892619
1990	7.750750750750751
1991	9.035150057399004
1992	5.071319627737254
1993	8.241098329410686
1994	10.388172581738718
1995	2.8797390415844535
1996	2.3853009205846454
1997	6.050923488752223
1998	5.3686621693872105
1999	9.080972470750128
2000	0.07338414158241156
2001	0.4232715913047357
2002	2.1533314887392225
2003	1.0683374286796283
2004	0.620890072748986
2005	0.8313820646583067
2006	0.4982494326587295
2007	0.26831988483374586
2008	3.314623835647362
2009	0.6290404472335075
2010	0.18451310110971217
2011	0.13367573474437566
2012	0.07963625577631785
2013	0.05729165260876336
2014	0.0841446141576892
2015	0.2262105252296216
2016	0.2269782366459037
2017	0.23845699424519107
2018	1.2391760194039017
2019	4.0445610126288845
2020	3.5454821354552433