Year	% of total merchandise exports
1973	2.5690391673184525
1974	2.127638969591323
1975	1.6381494464304307
1976	2.0357364180954347
1977	2.1262533948800564
1978	2.915291529152915
1979	1.8396326156615466
1980	3.3373981130864516
1981	4.903371455506215
1982	8.47707368285338
1983	6.4722000624327976
1984	7.044864361658691
1985	7.166174347723814
1986	6.713019314800772
1987	7.5781313801342325
1988	8.881062693121788
1989	10.786502637714744
1990	9.551460118400094
1991	27.511833544939616
1992	23.10784458399112
1993	14.490094122678348
1994	18.584400189265313
1995	1.0982257688716006
1996	20.89110199048262
1997	20.3251817246497
1998	19.756373537610656
1999	19.880683951292006
2000	1.5941914555153116
2001	1.5768958780881686
2002	1.5769685797002904
2003	1.5768388488161664
2004	1.5768464526355102
2005	1.5766805622112314
2006	1.5769040439826483
2007	1.5769222701504229
2008	1.5770833478482178
2009	1.5769222443973168
2010	1.5768898488777945
2011	1.5770173870312592
2012	1.5766951294235165
2013	1.57669513925548
2014	1.5766951304348082
2015	1.749592380366722
2016	1.9368074889436653
2017	1.734908294947184
2018	2.0827640911649437
2019	1.577284221926625
2020	1.6857845940949079