Year	% of total merchandise exports
1960	0.0904909320285165
1961	0.08464032095609707
1962	0.3926516551576104
1963	0.18240459771835235
1964	0.2106002106002106
1965	0.26093030119651234
1966	0.387209494502727
1967	0.34266730232005727
1968	0.3058464526997329
1969	0.29843839228651536
1970	0.38894341215369793
1971	0.36220808414609196
1972	0.27978723024905605
1973	0.11237324612772591
1974	0.0846727027603835
1975	0.16527242031552544
1976	0.17430714066746616
1977	0.18854132849369487
1978	0.19573065960881098
1979	0.11685428298735537
1980	0.2137057666785654
1981	0.19066246533627734
1982	0.21845060060689384
1983	0.2859530902673
1984	0.26701565449411774
1985	0.3670528685800951
1986	0.326045413287442
1987	0.3405872487112372
1988	0.3647630302690957
1989	0.5077577448994702
1990	0.7144678200713112
1991	0.699425748950043
1992	1.0252540368144514
1993	3.0630585481514636
1994	3.2489561911596585
1995	5.049325702792317
1996	3.6277048429842376
1997	4.290330985300709
1998	3.5740683977931336
1999	3.394996259566485
2000	4.075466794727986
2001	3.961729080316359
2002	3.8426521150717803
2003	3.2389063091532186
2004	3.9012815426706084
2005	2.3050467465464863
2006	3.1669057536259726
2007	3.9205641811277196
2008	2.9704951585963375
2009	2.3773179855251816
2010	2.9158221179429296
2011	2.277740206560102
2012	2.0106886215728794
2013	2.162396389040407
2014	2.1406058133420087
2015	2.3070522584254625
2016	2.964842992812838
2017	3.173192520188997
2018	3.145634589973946
2019	3.326334881786629
2020	3.3257099132238768