Year	% of total merchandise exports
1960	0.11756407241946862
1961	0.039666798889329634
1962	0.06165228113440197
1963	0.054724553082816485
1964	0.2574002574002574
1965	0.14381591562799617
1966	0.36496350364963503
1967	0.19115585574104751
1968	0.5017561465127948
1969	0.5515242738076517
1970	0.3893870294504136
1971	0.217687909122963
1972	0.31137321816675906
1973	0.32783959344132935
1974	0.5442822137154602
1975	1.2626334205744054
1976	2.4532667931413656
1977	1.9851872738808025
1978	2.085423685850382
1979	2.610879407880885
1980	3.676736246367926
1981	3.894668603652155
1982	3.9142720861214584
1983	3.7909026252411
1984	3.1386101018987485
1985	2.856738723743958
1986	2.2176126690944464
1987	1.9159351420011115
1988	2.0601228493948716
1989	2.1097731433589213
1990	1.2319945535382122
1991	0.7774417410623703
1992	0.6951344735340476
1993	1.0331166254143382
1994	1.1680106653220363
1995	1.0148217362800815
1996	0.7828818835992994
1997	0.6642803682306109
1998	0.6648882481223856
1999	0.7133881736362959
2000	0.5800910411882003
2001	0.42594981101420115
2002	0.3616189880045388
2003	0.367628322110744
2004	0.40105593328750905
2005	0.3797320780535866
2006	0.40066249827619493
2007	0.4449963284252805
2008	0.4487205859878695
2009	0.5086444480016613
2010	0.6503448462991
2011	0.5924036955976028
2012	0.5901108120848871
2013	0.6602023986567522
2014	0.6777878594381159
2015	0.7559303440281449
2016	0.6732890733891674
2017	0.6554314708173472
2018	0.5612166171098463
2019	0.5867532763448784
2020	0.4681516938414858