Year	% of total merchandise exports
1966	0.07694176723090629
1967	0.055946953999171156
1968	0.5110302622447478
1969	0.5201892311014271
1970	0.6422417814822878
1971	0.699740666288152
1972	0.8263887276863437
1973	1.0364897965613111
1974	1.0366173291790108
1975	0.27498588368153587
1976	0.10999043083251758
1977	0.7497391510127395
1978	0.509316721852372
1979	0.18902836756699193
1980	0.6222795421570209
1981	0.07906228762523802
1982	0.32868006452317133
1983	0.27415580073553997
1984	0.070603510430472
1986	0.3251703774840574
1987	0.135306686448957
1988	0.7620162562281886
1989	0.5392028828318334
1990	0.2819806198304729
1991	0.14938237591278697
1992	0.1037669964402548
1993	0.1413456995635984
1994	0.393240475365541
1995	0.28901608352205854
1996	0.07429754827665112
1997	0.028925108197459266
1998	0.12911816372355533
1999	0.08008021884576576
2000	0.07708326054034842
2001	0.11127017437651836
2002	0.038160410285837866
2003	0.4421624820945889
2004	0.8269823380280937
2005	0.9732799706813505
2006	0.41397868836789825
2007	2.1941662830204667
2008	2.176152393574261
2009	3.21277048220285
2010	2.4282138296281666
2011	3.2756613503108234
2012	2.631493433984735
2013	4.15262281564091
2014	2.9979960948259143
2015	4.207255852030851
2016	1.0384089175986486
2017	1.97928978679602
2018	1.0400340618357293
2019	1.4087100194152662
2020	1.021783261610331