Year	% of total merchandise exports
1964	0.8732309545317676
1965	0.642939150401837
1981	2.230069787638721
1982	1.0936161925271424
1983	0.4986726507384755
1984	0.6387247666121865
1985	1.1062408027106145
1986	0.7550594099856155
1987	1.1205682875740801
1988	1.0078586401183736
1989	0.6895634796286035
1990	0.8663937327494949
1991	0.48540897822258344
1992	0.7867838317285426
1993	1.0079202913992504
1994	0.6512170365317964
1995	1.0657130848726117
1996	0.8077515129903413
1997	0.9525037661014644
1998	1.0775048387042514
1999	1.5973615238405146
2000	0.7173111685089798
2001	0.7045869018329305
2002	0.8083098626733561
2003	0.7448600168599804
2004	0.4194815165499787
2005	0.05955217936576654
2006	0.2582754549963816
2007	0.3196811318397345
2008	0.1764325649027826
2009	0.38629237096739477
2010	1.5700536497950308
2011	0.3874208426097103
2012	0.058353427301085475
2013	0.008368354293182372
2014	0.023928674615698496
2015	0.005807558077321587
2016	0.00419240517894564
2017	0.003944423366133514
2018	0.0023627495878669985
2019	0.004950765871047845
2020	0.001431866735017151