Year	% of total merchandise exports
1976	0.0013308800777233965
1977	0.00032303080421749016
1978	0.0004457579445209662
1980	0.009492030345290857
1981	0.0020395794969814223
1986	0.037806278713629404
1988	0.011748120300751879
1996	0.00038455287769055324
2002	0.0002841159890324759
2005	0.011535710917475598
2007	0.00011184819668056656
2008	0.00021802728753137241
2009	0.03102802856775891
2010	0.0018538332994069103
2011	0.0031849229581256493
2012	0.0005756030558001807
2013	0.030969929004997253
2014	0.007063770000643679
2015	0.04449464416882527
2016	0.06354944048010056
2017	0.06356388371285353
2018	0.054471256174148754
2019	0.06386088651556424
2020	0.07020698512055322