Year	% of total merchandise exports
1963	32.1608040201005
1964	29.383886255924168
1965	26.08695652173913
1966	22.689075630252102
1967	12.4
1969	16.451365701461494
1970	18.301599942083545
1971	21.206093948370714
1972	10.073689142565064
1973	10.103206443512082
1974	5.9577327490748715
1975	3.603108444403732
1976	1.345959975118509
1977	1.374650512581547
1978	1.0102103541728686
1979	0.48111730122461555
1980	0.9058595472926142
1981	5.016835593786681
1982	6.4258857114294115
1983	5.510169736338206
1984	5.02448526333036
1985	7.312002523433855
1986	4.460839272067067
1987	4.399670669602647
1988	4.1332926283879505
1989	3.8930140929999033
1990	4.8822770779770925
1991	8.914704848495541
1992	10.329512250790845
1993	14.26974114656704
1994	13.642208840913742
1995	11.174103075255838
1996	8.816498804048642
1997	7.562588996392712
1998	8.250697197697939
1999	10.408646276628579
2000	11.587627931211493
2001	13.44780113000692
2002	17.12332782421049
2003	15.691482337286491
2004	15.70065469777153
2005	16.949074451716537
2006	16.873814874541004
2007	17.886884324863978
2008	16.30096333812508
2009	20.58922602937916
2010	21.460478499808023
2011	20.157060727740827
2012	19.72370291810587
2013	21.140568327171806
2014	17.207266916856685
2015	19.854385297726125
2016	21.829943812997506
2017	21.122126691769704
2018	18.711947035351116
2019	14.20136902475675
2020	14.308349981481639