Year	% of total merchandise exports
1960	3.9102025088932075
1961	2.99287012739635
1962	3.4718355330889827
1963	3.4684499969505587
1964	3.4638798827370927
1965	3.424442123887651
1966	3.4667631977424715
1967	3.360666244444705
1968	3.7457809112246188
1969	4.0325775489392
1970	4.0509692408733615
1971	3.650528050773025
1972	4.132495583435417
1973	4.74354992473979
1974	5.033796091304748
1975	4.8479440183012406
1976	4.397585763955862
1977	4.36081249374556
1978	4.522912932843609
1979	3.959981587276662
1980	4.00304649558329
1981	4.209717608086957
1982	4.415531546980005
1983	4.018785285657224
1984	3.680231495306465
1985	3.9109612438706214
1986	3.850765618553987
1987	3.2587621216867007
1988	3.7823142950113
1989	3.93299321783767
1990	4.095044346721205
1991	3.8504782011909695
1992	3.9521032834637224
1993	4.546883097188276
1994	5.232422555389168
1995	5.511369222940153
1996	5.1917546335943925
1997	5.223975619429935
1998	5.440385017054456
1999	4.216141144889386
2000	4.231905967713782
2001	4.103350690928407
2002	4.0252223180575175
2003	3.4535417981938217
2004	3.6982479134940216
2005	3.8127051955891833
2006	4.017967654168895
2007	4.14484563039497
2008	4.233829716562148
2009	4.473809846285569
2010	4.519005793328764
2011	4.673258550792279
2012	4.765822961354964
2013	4.696773493223027
2014	4.6651434722089995
2015	4.46836945509486
2016	4.390097539000886
2017	4.3089653202209774
2018	4.265281076474998
2019	4.162227449918652
2020	4.222089542479624