Year	% of total merchandise exports
1960	7.14876902133822
1961	6.606513872135103
1962	7.86070155933261
1963	8.027049207898028
1964	8.354453002202954
1965	8.35402294539059
1966	6.767766558020351
1967	6.060375897831514
1968	6.06451599424136
1969	6.059485101212709
1970	6.214825211606751
1971	6.554343677279995
1972	6.494682687053515
1973	6.484884547550922
1974	6.483374054622408
1975	7.41878679158635
1976	7.179327585971966
1977	6.120057877622046
1978	5.615686825418333
1979	5.172135422476772
1980	5.280911993570628
1981	4.678319513168884
1982	4.9682914567066945
1983	4.035867002587333
1984	3.5024409477139424
1985	3.863795604317451
1986	3.6663219665197735
1987	3.1874143176109158
1988	3.2689854954781308
1989	3.629596540550507
1990	3.7987760555988834
1991	2.84042169636497
1992	2.327009709666246
1993	2.1701623922758935
1994	1.9908507168456113
1995	2.217054895688296
1996	2.178577852775537
1997	1.3422913598972412
1998	0.7487613253891283
1999	0.6398843999660434
2000	0.44641073618832283
2001	0.51096040248691
2002	0.4215297035295688
2003	0.32368461840824975
2004	0.3257376178277197
2005	0.35568077885640653
2006	0.3899802321144606
2007	0.45747488917785323
2008	0.5099515013900479
2009	0.7695691543453274
2010	0.6080394887352611
2011	0.72601226279216
2012	0.5674327151106016
2013	0.5587564004748093
2014	0.5812219914421805
2015	0.5886741134919606
2016	0.5952703535000917
2017	0.2987973870964261
2018	0.158191945556664
2019	0.17252641386351877
2020	0.1659659125898818