Year	% of total merchandise exports
1960	2.244745412803218
1961	2.212111049118355
1962	1.5185685250109473
1963	1.8065154291611325
1964	2.0318370491786633
1965	2.205000654048172
1966	2.2236762879054908
1967	2.695147480977273
1968	2.747420259840339
1969	2.59927885521618
1970	2.454881657936172
1971	2.595268647888387
1972	2.604411768530092
1973	3.067986290491572
1974	3.2015869793016223
1975	4.215170468779887
1976	3.6346754533840238
1977	3.7442791697296856
1978	3.643098629667427
1979	3.8476885318115515
1980	4.373030917140382
1981	6.553919810005501
1982	7.241396059754046
1983	6.4871427497085135
1984	5.879634412713524
1985	5.306508205349728
1986	6.0636780573673565
1987	5.835109418203648
1988	5.60091652707079
1989	4.853889092017054
1990	4.449292219614051
1991	3.338939562010278
1992	3.3081918570615154
1993	3.350620827800731
1994	2.898076036639482
1995	2.8544090882643602
1996	2.65648096923949
1997	2.58225633855873
1998	2.8067536055171556
1999	2.73977313595161
2000	2.573583811262394
2001	2.8765849309425535
2002	3.180472558750322
2003	2.8789989936461238
2004	3.0175513331241586
2005	3.0276630521351255
2006	3.0959938612704447
2007	3.4764938529123435
2008	3.928570388811704
2009	4.303299891437066
2010	4.042242769113109
2011	3.8374053674477606
2012	4.258302060494215
2013	4.4963345014838545
2014	4.738431834660947
2015	5.148869853595096
2016	5.036705255381085
2017	4.587312906132271
2018	4.240984413827788
2019	4.454065423585017
2020	4.383111656457343