Year	% of total merchandise exports
1960	3.189066059225513
1961	1.2135922330097086
1963	1.0869565217391304
1965	0.7042253521126761
1966	0.5787037037037037
1967	0.2781879674177107
1968	0.221733361268245
1969	0.24007117765267147
1970	0.5814302884615384
1971	3.3412504814481965
1972	4.729035100602145
1973	2.669617927787734
1974	2.916458285546685
1975	1.8647277300111131
1976	1.45918645409106
1977	1.1158489219905918
1978	2.665492253317625
1979	6.665425769808462
1980	3.0706378188344448
1981	0.43886198547215494
1982	5.841871845847988
1983	8.366326411520197
1984	6.820554460039438
1985	6.958014671453099
1986	9.531894169219324
1987	7.386541295481877
1988	6.809063496286989
1989	6.35099188126841
1990	5.021856168296289
1991	8.124404177915464
1992	9.178398997797183
1993	17.235353736332172
1994	6.234992322350041
1995	5.216634547511489
1996	1.4592338098932358
1997	2.056122739976045
1998	2.1901660398128615
1999	2.882156708187438
2000	13.910683682611674
2001	5.288354538739386
2002	2.7034585062663536
2003	2.649342595906286
2004	2.2334404511316084
2005	4.741263343456386
2006	5.084710873215548
2007	3.9754711833223606
2008	7.063506647420079
2009	5.020858999975733
2010	7.152656215937498
2011	6.375211333004054
2012	7.4323510222081195
2013	6.350452540477325
2014	10.913246555954146
2015	4.962998379829105
2016	1.807270881203825
2017	9.79181090636317
2018	1.855201947487184
2019	7.123250209957492
2020	2.7261155843354814