Year	% of total merchandise exports
1972	0.05047973523023381
1973	0.0061013521758584025
1974	0.003633894240050511
1975	0.06853050722712997
1976	0.02126808420135812
1979	0.055283127825091045
1981	0.3274450753292306
1982	1.0403467210254713
1983	0.5903486881333986
1984	0.06793285106763228
1985	0.06198506073343932
1986	0.0372415906011765
1987	0.00691397754842927
1988	0.007153397783571941
1989	0.015252144529574711
1992	0.022847334005121293
1994	0.19163068659550503
1995	1.237275350498906
1996	0.9782530921387207
1997	0.5413624227443927
1998	0.9063989374129842
1999	0.44946394675497586
2000	0.40659444437835046
2001	0.5485531813517339
2002	0.23694254604865922
2003	0.36082751342912517
2004	0.08477967509974249
2005	0.3322409096298664
2006	0.11300984347669765
2007	0.032415743188671235
2008	0.37044416531022917
2009	0.21396461369411388
2010	0.5038382449220672
2011	0.6254270927059579
2012	0.5168370282727861
2013	0.5664657642852776
2014	0.6011877704919566
2015	0.6048121239280927
2016	0.8609425976018098
2017	0.8634796048749338
2018	0.7112953362254457
2019	0.8002576747546947
2020	0.7914964789795335