Year	% of total merchandise exports
1960	0.6142215922513584
1961	0.7629233511586453
1962	0.7086938607334157
1963	1.044850380268676
1964	1.8240268362569014
1965	0.9277251927537141
1966	1.717403790924756
1967	1.6922519037833916
1968	1.7750850340136053
1969	0.9634611888747501
1970	1.5801370888521273
1971	1.743040242557883
1972	1.8131453663507795
1973	3.110763373556172
1974	6.968295281716983
1975	6.8153064758166915
1976	3.797024574691653
1977	3.9755145083952605
1978	3.2868715664580357
1979	3.4620240373132174
1980	5.134356862717822
1981	5.64711843785649
1982	5.612349390271419
1983	6.214721843145546
1984	5.220193953011811
1985	5.546714657143459
1986	4.915202862715285
1987	4.968805721100181
1988	4.024836847147953
1989	3.6344648602442216
1990	3.234919087916601
1991	3.3221104605558174
1992	3.3108959323763254
1993	3.428156419076087
1994	2.8653479604342778
1995	3.5499201915548744
1996	3.5574537347459363
1997	3.9958136769778405
1998	3.5191622292070597
1999	3.198240817086792
2000	2.698375712723894
2001	3.802217398852744
2002	4.316052463424282
2003	3.7457904352047433
2004	4.130971518718394
2005	4.395808137149803
2006	4.855678770509577
2007	4.386092148210408
2008	4.9602287574137875
2009	6.037337060870489
2010	6.2278517693088675
2011	5.903724312016185
2012	6.11663081631136
2013	5.801840500641317
2014	5.955392357174589
2015	6.3423386671131246
2016	6.193500190725951
2017	6.242599443454623
2018	4.753637918329118
2019	5.5670264819982
2020	5.430567204547929