Year	% of total merchandise exports
1960	5.088062622309197
1961	3.590174259920218
1962	4.849752757702549
1963	4.428730926684034
1964	5.095923261390888
1965	5.422408627920911
1966	4.794252122795559
1967	3.3979328165374674
1968	4.145437702640111
1969	4.947735997409926
1970	4.8814704535043525
1971	7.759691223359624
1972	7.0303248181356786
1973	6.4128046866827075
1974	9.123067717819406
1975	10.773412218726772
1976	10.732598002682964
1977	11.367100006927286
1978	10.554754496471123
1979	14.593537081782365
1980	12.919921725313074
1981	8.158299219777545
1982	10.056805723056682
1983	7.351292208724397
1984	7.789956616262908
1985	9.580414418766942
1986	10.096226791774805
1987	11.691836405653786
1988	10.052105222051555
1989	11.946406041575825
1990	11.593134150231288
1991	12.097193515025483
1992	13.44892605815702
1993	13.358175030053932
1994	13.551243542871823
1995	10.846485549659333
1996	12.03666468615224
1997	12.659006758593316
1998	13.014861094346934
1999	11.421491491544707
2000	11.893437137739038
2001	12.292853445698002
2002	10.957999698149075
2003	10.106023825620696
2004	11.275115756977511
2005	10.742448107989176
2006	10.851652802667346
2007	10.153731870133372
2008	10.148974971990427
2009	10.037531730367188
2010	10.650056999830605
2011	10.178078071453516
2012	10.537221580352595
2013	12.31881003209096
2014	14.934103196001757
2015	13.129648318996134
2016	13.243039700715897
2017	12.073061827719025
2018	10.673620085170759
2019	10.540112575026107
2020	10.06565419898815