Year	% of total merchandise exports
1960	26.08716824933041
1961	25.89341094517868
1962	26.929126572908956
1963	26.191192266380238
1964	26.045914514423803
1965	24.45314668965618
1966	24.762863269789896
1967	23.623793621322246
1968	22.84244573928239
1969	20.87087087087087
1970	21.282404879358058
1971	21.433037474004703
1972	20.58539523212045
1973	20.813202536235433
1974	24.39103549068589
1975	25.960350991225216
1976	22.914382520307544
1977	21.71951742097109
1978	22.35783720639159
1979	21.150028835855323
1980	24.35153205107893
1981	24.86972842630913
1982	23.093894304771677
1983	20.585464098946623
1984	20.965146469233662
1985	21.09660353997242
1986	19.72565378565581
1987	19.058425251035185
1988	19.370841938021176
1989	19.486994768199896
1990	19.480067117682555
1991	20.63080543089462
1992	23.581946043849157
1993	24.57648016600113
1994	25.31191490940186
1995	24.315024673210743
1996	25.455110477273386
1997	27.181664972641123
1998	27.703380640155643
1999	26.92721263822882
2000	28.603672616742664
2001	29.474601450564002
2002	30.027031900238725
2003	30.32245451731989
2004	30.860245473004582
2005	31.03178341892364
2006	32.049826902863096
2007	32.45828208722875
2008	33.7674060855921
2009	35.18153863621311
2010	37.054818433021005
2011	37.97326703759916
2012	38.100165252425924
2013	39.334637743644
2014	39.56294346866361
2015	38.845293731431575
2016	38.96258021352411
2017	39.73015986458421
2018	39.27549011446666
2019	38.625792122087354
2020	39.43303459981279