Year	% of total merchandise exports
1960	9.720553042724212
1961	9.913370338795065
1962	11.285058128775006
1963	15.836506397153316
1964	14.18130436454832
1965	14.350404026319808
1966	14.545310221379717
1967	13.866885194496453
1968	17.793922408430067
1969	12.943386765966647
1970	14.017341628278746
1971	9.696186077841345
1972	10.177590609150602
1973	10.66492806454871
1974	11.05476696874422
1975	18.787121659338585
1976	12.147992059068521
1977	12.821117125286507
1978	18.30318106884517
1979	21.032303480523364
1980	24.26170271685877
1981	17.50750031150484
1982	13.313020558919389
1983	16.462600203055526
1984	15.551385262245523
1985	17.277417759571016
1986	18.237374699413824
1987	17.66539798333976
1988	15.606651714866995
1989	18.535578369749874
1990	14.099931334345083
1991	14.982211693979322
1992	14.387191035639313
1993	8.589473148500975
1994	13.479659175598332
1995	11.789773845096514
1996	10.050830000203808
1997	2.3455872946123106
1998	2.754906365293182
1999	6.552031542723734
2000	6.677606585345462
2001	7.051160238074876
2002	6.908805012454415
2003	5.7094478496145395
2004	5.420728092263237
2005	5.35540241974174
2006	5.154525705573377
2007	4.615148636061212
2008	4.719234989572856
2009	4.279205739509184
2010	4.431272384702369
2011	4.814469472069422
2012	4.255868962983882
2013	5.203210751092405
2014	5.983552516212362
2015	6.024847574208526
2016	6.114222175300692
2017	4.943415927152925
2018	5.142060916860139
2019	4.023495189088026
2020	3.484649717784634