Year	% of total merchandise exports
1960	9.23940786115365
1961	11.957349581111957
1962	11.135005973715659
1963	10.707290533188248
1964	10.288402536305993
1965	10.674050028642363
1966	13.506711409395974
1967	13.079886116228437
1968	16.939443535188218
1969	13.721151275729943
1970	13.42646327308904
1971	14.94000541304544
1972	10.440684953693479
1973	8.110749185667752
1974	9.41385275952635
1975	7.491937248484974
1976	5.1121872199627765
1977	7.487537812619828
1978	3.693936709880014
1979	7.651110527391074
1980	5.1412144673248275
1981	6.12331271530117
1982	7.460349845729775
1983	6.506029582027033
1984	7.266104669113192
1985	8.244169995837016
1986	8.691886587211501
1987	8.702087541441369
1988	6.917879152778794
1989	7.431568880944905
1990	8.084652186157001
1991	8.179636293755092
1992	5.950947997824995
1993	6.7429341784984596
1994	7.3818815167514416
1995	7.075007827759731
1996	6.9380700596866
1997	2.8372673965169275
1998	2.1468617954448583
1999	2.2934808610266733
2000	0.6301135033404195
2001	1.9379088886219493
2002	0.8558541286194774
2003	0.5695172086074564
2004	0.08698856159139906
2005	0.4897153928990284
2006	0.4862710053198848
2007	0.4685926967686091
2008	0.40979318233978657
2009	2.0136619292253184
2010	1.598055227966605
2011	1.3269137254809125
2012	1.1360392738332024
2013	0.9259614617036137
2014	0.719721008269454
2015	0.5272267849995664
2016	0.3356694497682539
2017	0.3138668269323425
2018	0.4962322813547246
2019	0.27525798612647023
2020	0.09272034820504879