Year	% of total merchandise exports
1960	2.4629375856484366
1961	2.7463993113137124
1962	2.887540243623675
1963	2.835058435467289
1964	3.559134368885382
1965	4.326032966955464
1966	3.949896981645382
1967	3.2827652596473897
1968	3.853150473805252
1969	4.511502548582983
1970	3.7174115563061307
1971	4.163363968202025
1972	3.3877239918370154
1973	3.0435328139374236
1974	4.066129117247986
1975	4.702317397562886
1976	4.085184907570113
1977	4.122687322428955
1978	3.211119191970845
1979	3.7470039637407666
1980	4.227104334306171
1981	4.127123041361666
1982	3.819540603522726
1983	3.0743850703408353
1984	3.256365027652069
1985	2.7809427023843027
1986	2.8715279334153863
1987	2.828749437357984
1988	2.6579300002207717
1989	2.7043878912659953
1990	2.592057414574747
1991	2.9489054983167935
1992	3.3061480782993735
1993	3.6078354571208617
1994	3.557628107291367
1995	3.169865894873879
1996	3.272789648297624
1997	3.6535443237150322
1998	3.8537745401339163
1999	3.176417060853059
2000	3.185976954278516
2001	3.2470901281436695
2002	2.7215226587265087
2003	2.730496509376741
2004	2.9753352171604956
2005	3.0069363636343587
2006	3.2554652258495658
2007	3.3795930875778075
2008	3.6540724125945987
2009	3.4206030819535327
2010	3.921829174351299
2011	4.003443568220827
2012	3.8090094062028417
2013	3.883918372449646
2014	3.767146424622567
2015	3.9773550814798386
2016	3.9006636328108266
2017	4.12496221791264
2018	3.988681739800013
2019	3.9429283887910844
2020	3.7709663250591516