Year	% of total merchandise exports
1964	0.1488095238095238
1967	0.06101281269066504
1968	0.042022692253817065
1969	0.012414649286157667
1970	0.010914051841746248
1971	0.20901639344262293
1972	0.4175600947974269
1973	0.33039647577092507
1981	0.00815281339446364
1982	0.002530588327074403
1983	0.009538960840802755
1985	0.009321981869807833
1986	0.002106627689368431
1987	0.006052260845365639
1988	0.006300212057879127
1989	0.005492604530143911
1990	0.015728875882787766
1991	0.07420089389455732
1992	0.09496061395547412
1993	0.14592843447132248
1994	0.13932799394785667
1995	0.5208208101893798
1996	0.46553528725251214
1997	0.7059458578043425
1998	0.2644494276986083
1999	0.18328012297505025
2000	0.3475930332178073
2001	0.45016148424398195
2002	0.7918582409622661
2003	0.6195364032108224
2004	0.622869143020975
2005	0.40144802724803974
2006	0.3633400024082837
2007	0.6550007528964467
2008	1.8830483758014354
2009	0.13916889195812782
2010	0.2178944824240711
2011	0.1993434785236804
2012	0.3518296041780976
2013	0.6646525483364525
2014	0.4724235199869756
2015	0.8062280585924491
2016	0.433437442491737
2017	0.5276330013390631
2018	0.7940917500856148
2019	0.28328152465595396
2020	0.16553236324724016