Year	% of total merchandise exports
1960	3.420042269596526
1961	3.3517135367730404
1962	4.038394697798574
1963	3.947054275760943
1964	4.363845371612161
1965	3.862879644810073
1966	4.494737327326427
1967	3.7849532847241143
1968	3.2592013495504695
1969	3.521974891314951
1970	3.496053817627334
1971	5.548778938912616
1972	3.1065080931047455
1973	2.4219732375793317
1974	2.8507852163930933
1975	2.7475498336573634
1976	2.375524801467471
1977	2.3048762702247862
1978	1.9799472927989181
1979	1.7569462180566768
1980	3.0072410642809886
1981	8.179598706204557
1982	9.893782519222025
1983	9.367136765237223
1984	8.706612461251103
1985	8.962694605043705
1986	7.165764701334357
1987	8.92331463307487
1988	8.635705629304184
1989	8.170776036853997
1990	6.867308580381865
1991	3.1730350764337443
1992	4.6836700435458
1993	6.489446992702976
1994	5.353945907684518
1995	7.682588617165598
1996	7.7480264602178135
1997	8.535183733072204
1998	9.089313057981498
1999	10.992058655218452
2000	12.613577276780433
2001	12.452345379669485
2002	13.89926739912624
2003	15.11938510275885
2004	16.915333702323423
2005	14.96633812056046
2006	14.29043440476464
2007	13.481465821395311
2008	14.759690734549173
2009	17.03826652843375
2010	17.356747926053178
2011	21.80289749595534
2012	22.596732773821575
2013	25.141363911471903
2014	27.504286881849026
2015	27.97513781301263
2016	26.188190419512587
2017	28.17054595270381
2018	32.85108722671069
2019	34.973090045916514
2020	39.444696441490755