Year	% of total merchandise exports
1960	0.41775660797251396
1961	0.31466100764699423
1962	0.38421955403087477
1963	0.39178812098417176
1964	0.3029724049458198
1965	0.3155529750334486
1966	0.513084834711712
1967	0.4575394544891915
1968	0.40347106767770974
1969	0.44296009843557743
1970	0.3126244230457287
1971	0.36999302911684273
1972	0.3208458455601101
1973	0.38475767665556787
1974	0.3597710547833197
1975	0.42499942333863866
1976	0.48604255042149
1977	0.38755008480940206
1978	0.2634900961692947
1979	0.27534199800940085
1980	0.3416071093885374
1981	0.7712228685997236
1982	0.5541531191308036
1983	0.46534566830797136
1984	0.4999442855551016
1985	0.5933507161378393
1986	0.4879346535927076
1987	0.5212680782924212
1988	0.4864493962098363
1989	0.4973111648192298
1990	0.5239292678591758
1991	0.5013583282692479
1992	1.1317467955573968
1993	1.6253820014557534
1994	1.4023756562992
1995	1.5709987560740089
1996	1.9291150340677041
1997	2.4277941414634783
1998	2.3440204264136604
1999	2.4007095213365846
2000	2.1977220851056045
2001	2.037854063878477
2002	2.3746494227895663
2003	2.630403955305731
2004	2.9840447244784527
2005	3.3927258357014085
2006	3.490516786815624
2007	3.886371396870858
2008	4.442230894741991
2009	3.495541867110853
2010	3.6719450381872116
2011	4.575697834587753
2012	3.889257247477676
2013	4.084384980001194
2014	3.6756549406298396
2015	2.988023990173113
2016	2.9613636930145746
2017	3.197361201281716
2018	3.0168008682396605
2019	2.965954108957752
2020	3.004582835969586