Year	% of total merchandise exports
1973	1.3206184946754107
1974	0.9635870617857833
1975	5.101863742060876
1976	1.8942367279487708
1977	1.7782459183989592
1978	2.321811128481269
1979	3.029185801267628
1980	3.9856235158205506
1981	8.450966285444936
1982	10.471787598883845
1983	6.505150705837466
1984	5.6092701171013735
1985	6.121262703691841
1986	5.990691738344746
1987	4.949571868572836
1988	6.742575851010617
1989	5.221081229259792
1990	5.3455559046381715
1991	21.202537145165103
1992	2.2086628371929105
1993	1.1278912367775722
1994	0.38591705430141576
1995	0.719313582435186
1996	0.39579338281787924
1997	0.8071383497021877
1998	0.8575641513837766
1999	1.2940348843420708
2000	0.7605005474537953
2001	1.8345463186197508
2002	1.8346308439944015
2003	1.8344799632204731
2004	1.8344888125582821
2005	1.8342957810813778
2006	1.8345558389457544
2007	1.8345770068695886
2008	1.8347644194378965
2009	1.8345770059197783
2010	1.8345393033452297
2011	1.8346876740904876
2012	1.834312772378467
2013	1.8343127891179745
2014	1.8343127755802477
2015	1.4308946499071105
2016	1.2420876466049313
2017	1.7807111024872937
2018	1.3411181468406423
2019	1.9417350760263212
2020	1.3360687950828263