Year	% of total merchandise exports
1960	2.417665318198552
1961	2.023446750188829
1962	2.4419155553010636
1963	2.601942177931245
1964	2.947633354718827
1965	3.5281497820194527
1966	3.4152299836118547
1967	3.1460453931848065
1968	3.502453859775746
1969	3.890103768044794
1970	3.8977191713018424
1971	3.9555716336535394
1972	4.052666785400767
1973	3.8796322093673683
1974	4.536981099264425
1975	4.806361094441673
1976	4.32429666361295
1977	4.190523570921415
1978	3.890337606016537
1979	3.9203036405413436
1980	4.428251561817088
1981	4.976655288852599
1982	4.629368022715775
1983	3.9685694526669346
1984	3.8935682966961127
1985	3.7741952167083466
1986	3.5718043222708293
1987	3.484383300715024
1988	3.2701549083990553
1989	3.3485942871272476
1990	3.180673075685741
1991	3.245024093162195
1992	3.3900461355426583
1993	3.805446471095474
1994	3.84094556298968
1995	3.7280904282853413
1996	3.859976967223259
1997	4.273845667574413
1998	4.406086459239724
1999	3.633567240631023
2000	3.7165220713753953
2001	3.8604685678400696
2002	3.521948438874319
2003	3.313935626476389
2004	3.595430211161146
2005	3.6210442548789157
2006	3.8108323162516307
2007	3.9633077455536307
2008	4.312615435192308
2009	4.152647232424781
2010	4.540494705973193
2011	4.696313944179669
2012	4.604049873010742
2013	4.623285311260558
2014	4.539833204345896
2015	4.4700596929058225
2016	4.364052737673899
2017	4.499485655090899
2018	4.443158192531348
2019	4.370853487746882
2020	4.194114301053327