Year	% of total merchandise exports
1970	0
1971	0
1972	0
1973	0
1974	3.2081707274197417
1975	0
1976	0
1977	0.5492760985521971
1978	0.7550762679925682
1979	3.253646845865061
1980	7.355316203613755
1981	5.779704093673403
1982	7.794333170493404
1983	7.794333160743803
1984	7.794333154534041
1985	7.794333174251398
1986	1.7408077039156744
1987	1.0218278301605248
1988	0.4563947203588302
1989	1.655165684886789
1990	0.185418859057276
1991	0.059770957257456285
1992	0.00818839628651664
1993	0.014185397543770654
1994	0.013754318409163089
1995	0.021277235599759386
1996	0.019323058175506884
1997	1.0431394485909673E-05
1998	0.00032900478922668355
1999	0.003534196276142367
2000	0.0034738373629076345
2001	0.05111775410705722
2002	0.034468414088750066
2003	0.03522581518127624
2004	1.2397685758440076
2005	1.2521237469536917
2006	0.5994686076873549
2007	4.935011067730743
2008	6.962999600448059
2009	5.829842089402467
2010	3.698501382793108
2011	3.854408109001295
2012	2.780418115580795
2013	2.0246743235135085
2014	1.5244119558549396
2015	1.4213565864265765
2016	1.8147932668195528
2017	2.984933359956619
2018	6.332015204615902
2019	5.373243277721242
2020	5.373243276741992