Year	% of total merchandise exports
1960	3.989341454130187
1961	3.9496527777777777
1962	4.073700878076868
1963	3.774662183594493
1964	3.7536206183129397
1965	5.292158643657281
1966	4.8893335000625235
1967	4.484863585399277
1968	4.377682403433476
1969	5.441518308857713
1970	6.346987070860774
1971	4.763530493992243
1972	4.480005907159149
1973	3.4019952873085257
1974	8.419207779325374
1975	13.539778599138868
1976	7.4489328205026
1977	6.294062671706432
1978	5.327939988981881
1979	4.6022369127062275
1980	4.541415386073624
1981	5.140345043280563
1982	3.256110721803038
1983	4.58177748769794
1984	3.6905628831035724
1985	3.2020839221357678
1986	1.9440002914654915
1987	1.8787477777919386
1988	1.7163527996368202
1989	0.8421708842042819
1990	1.8689419088754846
1991	2.3557117462087542
1992	3.9647871657096005
1993	3.963963311302515
1994	1.8139082611115378
1995	1.6660564255766779
1996	2.2444650575454466
1997	2.135848299098191
1998	2.3327536042465282
1999	2.1773096289491356
2000	2.50308795025177
2001	3.3427668983305345
2002	3.569228877796958
2003	3.6902919326571095
2004	3.9155219434892334
2005	3.6147899169347983
2006	4.040642525550118
2007	4.3112776881492545
2008	4.170891649022071
2009	4.077740846187374
2010	3.772996148618034
2011	3.23645564218809
2012	3.9839106303226477
2013	4.485822917261735
2014	4.4032305442859885
2015	3.67874313484594
2016	3.290251960574654
2017	3.1979359377742966
2018	3.663654727177675
2019	4.079593551743351
2020	3.3875450424528304