Year	% of total merchandise exports
1964	0.6369426751592357
1965	2.1621621621621623
1966	1.82648401826484
1967	2.846299810246679
1968	1.9909323871476443
1969	2.2526750516238034
1970	2.064828699965394
1971	1.3136103583258054
1972	0.9146252657947628
1973	0.5663262416702849
1974	2.6814164196059957
1975	6.773829599773555
1976	0.6720695129083466
1977	1.3191066510455323
1978	0.9184424419840711
1979	2.8200683813077
1980	5.078128236356556
1981	3.0385974298829126
1982	0.382257914400819
1983	1.2863186593057154
1984	0.3937938582828454
1985	2.1699074070557782
1986	0.8634541646015256
1987	1.426295191641922
1988	0.9304937175714623
1989	0.9818608830573174
1990	2.0645066396173255
1991	2.0548550060332254
1992	5.994416623475925
1993	6.817281537773932
1994	5.515370504392366
1995	11.232366818711249
1996	6.9468055385742025
1997	2.642547622327667
1998	8.668026022041866
1999	9.098557432433276
2000	1.267794008302273
2001	2.6500087216742
2002	2.6891141689470066
2003	2.2004122175644008
2004	1.2445853339823794
2005	2.4515388979990256
2006	4.14761901066806
2007	10.180526199272997
2008	14.214818511702221
2009	12.966531103569482
2010	15.570365481685705
2011	7.279701982866929
2012	10.043370454655953
2013	67.56672634244786
2014	74.03239638901677
2015	35.850934894559735
2016	29.8134820511593
2017	29.057311620823562
2018	38.708969924522606
2019	25.904628959096858
2020	26.84602887906098