Year	% of merchandise exports
1964	0.1434109640503825
1970	0.16221802510016248
1971	0.27445721995735994
1972	0.46045195580450116
1973	0.4421759818147342
1974	0.41455990567023154
1975	0.09549058328706662
1976	0.06912710868660903
1977	0.19425380650671123
1978	1.8559965198978432
1979	2.088755280101037
1980	0.3856738619752181
1995	0.5037333193917132
1996	7.427887772633904
1997	3.894330480541467
1998	3.8599505339738633
1999	3.4580698441778317
2000	1.3238842203135541
2001	3.5826061448478503
2002	1.4138978814878977
2003	10.881791377262513
2004	1.6522250931841342
2005	1.6508906366851899
2006	2.7279921644005634
2007	3.639494469366105
2008	1.6823528973413482
2009	0.1951348924074188
2010	0.11452519800987464
2011	2.3750931810986478
2012	6.627370460017366
2013	0.8006571863290876
2014	46.451727219405534
2015	17.030449927511313
2016	12.054104771242072
2017	15.030837315734273
2018	0.24674853598742186
2019	35.48891922216188
2020	0.5246836046786988
2021	0.21400710415257337