Year	% of total merchandise exports
1960	3.115796523066356
1961	2.6366972548426135
1962	2.982884820826737
1963	2.9152357689952635
1964	3.1890036290989667
1965	3.548881079236482
1966	3.401140705492551
1967	3.1841535748321754
1968	3.5570501791239577
1969	3.9699807621814056
1970	3.7079735572410844
1971	3.744461259525225
1972	3.6585993155000116
1973	3.7630156246384043
1974	4.692693114546418
1975	4.952740113569098
1976	4.56859712034387
1977	4.514612831810229
1978	4.10607687837595
1979	4.303263282687208
1980	4.883365345141608
1981	5.3320110295789025
1982	5.118142627865573
1983	4.316553765398681
1984	4.2396358652797534
1985	4.147058013426991
1986	3.944393886338472
1987	3.611220529585942
1988	3.6552214958634734
1989	3.839695378258863
1990	3.6845195282509984
1991	3.74632743858486
1992	3.866046769234145
1993	4.362218286135026
1994	4.602578911803732
1995	4.5239666604023965
1996	4.49085399096843
1997	4.813507874741622
1998	5.002523431598787
1999	4.084065900605601
2000	4.199217799170125
2001	4.137844833592087
2002	3.7662083360503384
2003	3.494754382669174
2004	3.8221099484956533
2005	3.8559787572458717
2006	4.074080927960985
2007	4.10468672403338
2008	4.446362247974549
2009	4.2380813139677915
2010	4.61657984560512
2011	4.801692225767872
2012	4.707671038358404
2013	4.7189976602680765
2014	4.589843499862581
2015	4.48799486846219
2016	4.340751139737224
2017	4.455585655902409
2018	4.367898807053045
2019	4.273667477444856
2020	4.097268239822434