Year	% of total merchandise exports
1960	1.0706092276319144
1961	1.646542261251372
1966	1.0141661300708307
1967	1.6869469026548671
1968	1.9383578136287025
1969	1.6564483166612884
1970	1.5092453773113443
1971	1.9321687920132329
1972	1.9440822604445624
1973	1.6836534484404333
1974	5.533581651493645
1975	0.28705425729764694
1976	0.25919514468603067
1977	0.006905874654922076
1978	0.006383260537566286
1979	0.037107895769395716
1980	0.055117228134752345
1981	0.07438321722080535
1982	0.38001443026591425
1983	0.24592695485423388
1984	0.5748921617646818
1985	0.9895129702106283
1986	0.5085038195524677
1987	0.888919442622225
1988	2.3786079803722777
1989	1.9378593424370565
1990	2.577619908658843
1991	1.785147975939993
1992	2.117349307278696
1993	1.8032882163090407
1994	2.8540408773627903
1995	2.436226736259018
1996	2.006262797100402
1997	1.6579533750223803
1998	1.4832246453579132
1999	1.9917260187735097
2000	1.421990142708078
2001	3.1713908247276135
2002	2.652941884019366
2003	2.508204380128199
2004	3.2338873399190673
2005	2.233464720927288
2006	2.004437389910055
2007	1.732850766287284
2008	3.056155687454841
2009	3.144984298559266
2010	3.3752960091874886
2011	3.2374581624122496
2012	4.217342578524224
2013	5.4866193151146545
2014	5.422249153527769
2015	6.038152208945707
2016	5.950715989767517
2017	5.900230331512148
2018	5.781427628288656
2019	4.468855427730019
2020	4.468855429592384