Year	% of total merchandise exports
1971	0.062421972534332085
1972	1.2815126050420167
1973	1.0291296005581718
1974	2.67979396231336
1975	1.5399737876802095
1976	1.3811087502414527
1977	0.14844533600802406
1978	0.6339197938913184
1979	0.3496765491919974
1980	0.726726963940124
1981	0.5381016660811035
1983	0.9343715239154617
1984	1.1119422307891482
1985	0.7974623502905254
1986	0.036773748302388505
1987	0.17887893908389854
1988	2.7801741039918437
1989	3.0110308042377785
1990	4.948004687226841
1991	2.168617827584736
1992	4.191754482951063
1993	1.0970320341512323
1994	1.7244651486820788
1995	2.286209153990046
1996	5.501438973615351
1997	2.4755880567425774
1998	4.271424355626667
1999	2.2927604369111334
2000	1.3889189037712772
2001	1.0538040986455763
2002	1.2677874306975816
2003	1.6129788782439338
2004	3.9129888967831308
2005	2.336294953224295
2006	1.7600842101352419
2007	1.7638369024044187
2008	2.413246684851502
2009	2.2731497696901015
2010	3.6741905250785334
2011	3.5426975742355857
2012	2.173085736208112
2013	2.7420754767572935
2014	2.893719067965048
2015	2.322924008337183
2016	1.8041713370475627
2017	2.574838926437576
2018	2.391258770206286
2019	1.7907898138148466
2020	1.5094666613953205