Year	% of total merchandise exports
1960	36.009280742459396
1961	27.484545886828343
1962	29.697452229299365
1963	30.237077341624563
1964	26.28520339740724
1965	27.568331762488217
1966	36.85064935064935
1967	26.62490211433046
1968	27.645985401459853
1969	30.976563983742928
1970	24.320622656301655
1971	26.547568915810952
1972	26.284032137397134
1973	10.363166808438894
1974	22.3634218473069
1975	5.410387691841489
1976	14.935331287610918
1977	25.526711721204222
1978	12.892034550497252
1979	11.541506650009511
1980	12.170933745825684
1981	11.293746343497196
1982	11.29374634355141
1983	11.29374634194938
1984	11.293746346325092
1985	11.293746344652217
1986	11.293746341333637
1987	11.293746341728255
1988	11.293746344990083
1989	11.293746344929803
1990	15.448738190198366
1991	10.301115431947553
1992	18.94916210416701
1993	16.77186194593841
1994	13.682512079873138
1995	14.972188751989728
1996	14.039288170300592
1997	16.763092987994682
1998	16.921313349990804
1999	12.701654900672645
2000	7.723920228946976
2001	9.897461544380702
2002	12.540059146474647
2003	9.436692700676884
2004	8.144093255475852
2005	11.304931169309054
2006	11.938284651266363
2007	14.86304527203058
2008	13.385502887044018
2009	17.256792319422235
2010	13.42967514968226
2011	13.448999639011008
2012	31.01558469295963
2013	7.565754642896028
2014	4.8612311918947375
2015	8.784628339583374
2016	9.53046885964574
2017	7.048265602756021
2018	4.435646314086774
2019	4.3787072170238455
2020	4.846301889230512