Year	% of total merchandise exports
1960	2.9086572190262383
1961	3.4162554389881894
1962	4.904022331255149
1963	3.628579604234994
1964	3.513110339096743
1965	3.9238178474536154
1966	4.929463823137225
1967	7.580503332049447
1968	5.847771850749149
1969	5.712858710799245
1970	4.1944067336410535
1971	3.815756859305585
1972	4.848596651024793
1973	5.009589089266441
1974	8.380600082203042
1975	9.182629997827439
1976	9.69218261474519
1977	10.63220355399069
1978	10.200814450617276
1979	10.314405387867426
1980	10.844807564698074
1981	18.391858398530964
1982	16.090669748924423
1983	13.575179035458238
1984	11.84273983285557
1985	10.717542472520664
1986	11.092831234904335
1987	9.644489481081795
1988	9.485078850020244
1989	6.312002473424896
1990	6.67724498983909
1991	8.014125387955447
1992	11.170535290278663
1993	10.093824737842644
1994	10.541268913565816
1995	9.648807234744638
1996	9.566480037674637
1997	8.753249230915985
1998	6.793375965323523
1999	5.899296978016166
2000	4.858423678425986
2001	4.091476787808786
2002	4.577103583105996
2003	3.7828594180518245
2004	3.970091498479109
2005	4.146240947503389
2006	4.875926410729761
2007	3.9078814632842738
2008	4.090023662938766
2009	4.418434715123407
2010	3.877763464093778
2011	4.655556497692176
2012	4.9969612789397635
2013	5.6362753459522015
2014	5.933630019482463
2015	6.0403740903891325
2016	5.5503714538793085
2017	4.660821825017054
2018	4.690562810708474
2019	4.469836231319741
2020	3.9884340490712433