Year	% of total merchandise exports
1960	7.246779723843943
1961	9.282306575399295
1962	8.152531229454306
1963	7.842274992670771
1964	8.06783509543745
1965	10.7171581769437
1966	10.747692887186892
1967	7.4842939087680955
1968	7.514556707071447
1969	7.049729931085863
1970	7.237153882607812
1971	7.078811844767335
1972	5.087811514439428
1973	6.8967416583025285
1974	9.087671093471734
1975	13.116487049676959
1976	10.699665196527851
1977	8.767161585651772
1978	10.80454526992618
1979	9.754026883021593
1980	22.874955295337376
1981	35.5631102061092
1982	23.707990166110864
1983	23.77439156680322
1984	20.496953400596986
1985	18.26704224010099
1986	8.438985447810749
1987	15.286152510900036
1988	15.264733405935502
1989	13.35057278790758
1990	8.282506247970979
1991	7.304447298714259
1992	6.055974882679634
1993	3.710360202155863
1994	6.011520179323551
1995	8.27564941126992
1996	4.425137248640181
1997	5.237355108131214
1998	6.38099792986377
1999	1.1613217518447856
2000	2.5606528877141796
2001	2.3778695355019797
2002	1.6605757362824196
2003	1.6724876312759613
2004	2.7439997337553765
2005	2.9777510160859983
2006	3.775373354469216
2007	3.979223257755845
2008	4.331053956203117
2009	3.5689561199890605
2010	3.9333513160784066
2011	4.19476690216604
2012	4.995299733459382
2013	5.15459898158151
2014	5.19346569875414
2015	4.319724720575156
2016	2.5958259801655057
2017	2.268991237907651
2018	2.642755429038933
2019	1.7534385499859548
2020	1.8784049993424872