Year	% of total merchandise exports
1964	14.213197969543149
1965	8.560311284046692
1966	4.888888888888889
1967	5.490196078431373
1968	5.274135876042909
1969	0.9757503396599284
1970	0.011954572624028692
1975	0.8090775769928662
1977	0.6905634607612225
1980	1.9818869449089296
1981	0.17373052202167777
1982	0.009279143137410854
1989	0.011831763597819558
1990	0.0013422221952198588
1991	0.11608866864759437
1992	7.9124292051192855
1993	0.5134801780770433
1994	0.3084786492930827
1995	0.1322073458014541
1996	0.07003057943252064
1997	0.15234190257784772
1998	1.0050788820126701
1999	0.6525208091019096
2000	1.3836408821802715
2001	1.7480676208730788
2002	2.139144115029008
2003	3.310292762263921
2004	3.531706180869412
2005	8.610078857736188
2006	6.978038543892369
2007	9.456119161591296
2008	7.891437083859053
2009	15.800476205294952
2010	16.305064058930054
2011	20.89485058801132
2012	19.849902779598473
2013	20.448917193394372
2014	30.488089038636907
2015	38.16509803023216
2016	35.083264072496185
2017	38.361019347815784
2018	39.62450326003471
2019	38.592951185351644
2020	36.86846793933705