Year	% of total merchandise exports
1974	0.19549634349431613
1978	0.09389671361502347
1989	0.5133476542881085
1990	1.0724106341034219
1991	0.5866212982795092
1992	0.7300090631377415
1993	0.578761870717852
1994	0.7614962839152661
1995	0.6744682476491324
1996	0.677220464816773
1997	0.49117517621755463
1998	0.46751328196799397
1999	0.1555208029443638
2000	21.593036364273555
2001	21.525315879497864
2002	21.58396922493839
2003	21.622101158186954
2004	21.62217939010957
2005	21.623256182818768
2006	21.623783489154157
2007	21.623830690512474
2008	21.6238898987276
2009	21.623724976776764
2010	21.62387285540898
2011	21.62391726133067
2012	21.62371312494569
2013	21.623912113458232
2014	21.62392500787491
2015	21.62381968292397
2016	21.62248106902263
2017	30.113857560496577
2018	36.57426213379454
2019	36.108162305687415
2020	53.69034980517922