Year	% of total merchandise exports
1960	2.4892383266810896
1961	3.0467494026177113
1962	4.207198798072453
1963	4.7496838362563185
1964	4.966413535149857
1965	5.265775506531335
1966	4.752917350843201
1967	4.982446296210866
1968	5.048090762376477
1969	6.880098187617816
1970	7.277411434134084
1971	6.8563516472140345
1972	9.909273169424635
1973	10.456148438345485
1974	10.033190437604965
1975	6.473987096015263
1976	4.528071786215569
1977	4.728603771206512
1978	5.0561819603206395
1979	5.243752812651733
1980	5.926516655174347
1981	6.6069600521090095
1982	7.101073047132969
1983	6.765024811490984
1984	5.86971312016037
1985	6.389637389500341
1986	6.310877725436491
1987	7.529792543602847
1988	6.738840042191708
1989	7.350599969508442
1990	8.543596190086571
1991	9.461498754681175
1992	10.444482504824807
1993	9.956082026550673
1994	9.638744760282846
1995	9.13342206564277
1996	9.688684467076293
1997	9.677768375148961
1998	10.555069087969446
1999	9.817610235070521
2000	18.621542855865485
2001	18.187541170621
2002	18.743274780592806
2003	17.39908534390981
2004	18.553710057763865
2005	18.86841492253825
2006	18.10776155825611
2007	18.65186720707504
2008	18.026166935507405
2009	21.14282403460625
2010	20.397958154873766
2011	23.11228321319449
2012	22.636648073285674
2013	23.410230500162786
2014	22.12557350038366
2015	20.9365108356952
2016	21.660950663911905
2017	19.072252897972962
2018	17.810792413024146
2019	18.73660002524739
2020	18.785495136670548