Year	% of total merchandise exports
1964	0.16051364365971107
1976	0.533682911167082
1977	0.5966378953897044
1978	1.5008669992020933
1979	0.5103038050914163
1980	0.28987200362157467
1981	0.28204470758257383
1982	0.45760643586730543
1983	2.5368491700869926
1984	2.9729312126391827
1985	1.4933047355315445
1986	2.7024310872894333
1987	1.710622007861544
1988	0.974025974025974
1989	0.5417062462719971
1990	0.4720290871724966
1991	0.2482686528259956
1992	0.7782397079389446
1993	0.6064829153184189
1994	0.9240326386571832
1995	0.31030828069353333
1996	1.072824276539136
1997	0.35616098601918883
1998	1.0802378000658397
1999	0.7027474993944102
2000	0.8541531703709266
2001	1.7241330603109295
2002	1.268485444058189
2003	2.631336023737236
2004	5.696406075733976
2005	8.166335085973756
2006	11.542134696132793
2007	11.48993892541499
2008	5.603206307371604
2009	14.75909835449134
2010	3.862459468986739
2011	6.4032422004813645
2012	10.821244103891756
2013	11.810008515804418
2014	20.319016294542774
2015	36.958215726025166
2016	35.70494161826217
2017	35.59383228497571
2018	31.936970069953652
2019	35.63592228796117
2020	38.145069525787115