Year	% of total merchandise exports
1966	1.384083044982699
1967	0.6389776357827476
1968	1.282051282051282
1969	1.6835016835016834
1970	1.8485915492957745
1971	0.2808988764044944
1973	0.1221001221001221
1974	0.4303318771598096
1975	0.2162516382699869
1976	0.6808962719721846
1977	0.316950852557673
1978	0.7525678836570732
1979	2.500187326722781
1980	4.437379043406137
1981	2.843987499768857
1982	0.8313823560710865
1983	1.2421208750463477
1984	4.991512989441584
1985	2.63844420728092
1986	6.129029927750756
1987	5.572622573718977
1988	8.589522390400752
1989	3.1124195967025923
1990	11.626448389675677
1991	9.9557167286857
1992	9.599744493463165
1993	10.160537174103224
1994	6.785021290549877
1995	7.396768403730518
1996	8.033131289708864
1997	6.96536288369322
1998	6.764643752405855
1999	8.982490607375698
2000	9.535861265983515
2001	5.26011888278615
2002	3.8269140030268565
2003	3.5793107965824342
2004	3.308166092740114
2005	2.2966498516801055
2006	2.6293969622056363
2007	3.20853451645159
2008	5.939657333679866
2009	4.252738804189001
2010	6.064853274893584
2011	8.963260994851005
2012	6.936773030636996
2013	7.009226433323344
2014	5.510260981291641
2015	6.277509717109672
2016	4.576675673617872
2017	5.2616646316429385
2018	5.344347059727045
2019	5.602083097265915
2020	5.058777259723876