Year	% of total merchandise exports
1960	4.698581560283688
1961	7.985480943738657
1962	3.47985347985348
1963	11.721854304635762
1964	18.67798665858096
1965	19.63421194190425
1966	22.855879752431477
1967	29.751647237709072
1968	31.862087174635306
1969	33.78036031026935
1970	36.34310422708104
1971	33.751424103257214
1972	32.24463409126762
1973	32.335373788310726
1974	31.087436145774696
1975	29.4815149510239
1976	26.548867751589476
1977	19.99327299825334
1978	24.646775998015173
1979	26.31520859095871
1980	31.484300553167767
1981	39.8410089465128
1982	35.46252388384987
1983	33.65655112522423
1984	27.972287882080394
1985	22.818432233609517
1986	19.55991870324593
1987	26.63224869302317
1988	29.769483579342676
1989	30.48848765342065
1990	30.962894150483645
1991	35.20408667253435
1992	37.49845610460016
1993	38.36426611752529
1994	39.810898608805104
1995	34.908658307044504
1996	36.536841529376005
1997	26.747317827725315
1998	19.42799705085391
1999	19.954539366506722
2000	37.667553087440645
2001	50.2582268389969
2002	31.35196260441042
2003	31.850934832461945
2004	32.73915708593568
2005	34.44032772448653
2006	36.945387120194646
2007	39.43366088209251
2008	42.58420257531438
2009	37.8695906418844
2010	38.92558949183431
2011	36.42903633605149
2012	38.08540684868276
2013	36.504423669762346
2014	36.852501477063534
2015	38.08235001997951
2016	39.122020068972105
2017	38.79897442634026
2018	38.80497964665823
2019	40.01276350451926
2020	38.373357681527175