Year	% of total merchandise exports
1972	0.0010584698759473305
1987	0.0013629677270139433
1988	0.0006643713151997566
1989	0.004043301504671374
1992	0.0001647867438236624
1994	0.1250956132036723
1995	0.020080100514994696
1996	0.07665458381925176
1997	0.04879356654776629
1998	0.15945272837239025
1999	2.356406788095418
2000	0.041726462415267604
2001	0.03497199257247828
2002	0.08425776181576236
2003	0.10680740845537118
2004	0.08599001692421893
2005	1.6684764871905688
2006	0.045990211964586615
2007	0.016653819136427116
2008	0.05272113794929483
2009	0.04782735390560829
2010	0.045907236351319436
2011	0.040501535279002826
2012	0.20853561437507664
2013	0.10976079554228363
2014	0.04788922135962017
2015	0.8617374862562831
2016	0.5022347279155985
2017	1.1059256662522672
2018	0.911774606348089
2019	0.5937584915614369
2020	1.3780006797285569