Year	% of total merchandise exports
1961	0.7142857142857143
1962	0.9900990099009901
1963	1.6835610401057732
1964	2.439024390243903
1965	2.5806451612903225
1966	3.8461538461538463
1967	3.6585365853658542
1968	1.5810276679841897
1969	1.8139803581744656
1970	1.6200377539233086
1971	1.7529284705491401
1972	0.8578137729429243
1973	0.5833636172369604
1974	1.4392082793500147
1975	1.699600416005255
1976	0.7215775340974958
1978	0.43488901858162166
1979	0.0009414245636497147
1980	1.6335747763101833
1981	0.20048568362794372
1982	6.452753088441943
1983	4.308531539078099
1984	20.099456693627022
1985	9.486257807646156
1986	6.262294747751124
1987	0.31236204940796497
1988	16.41729668495559
1989	21.543710345117915
1990	8.441712080780396
1991	7.60195782150255
1992	1.9323898183205992
1993	5.545585923397785
1994	4.581487782796443
1995	3.330500838364964
1996	2.58433837105841
1997	5.078748404898871
1998	3.062925866508198
1999	0.8705248522702658
2000	0.37228771328770494
2001	0.6775363768429072
2002	0.3575611953871098
2003	0.6403076748635103
2004	2.5030673452641845
2005	1.2259179429845395
2006	1.7637158026549176
2007	0.7968213098482335
2008	2.768234540594879
2009	2.218824968333937
2010	1.793460647236159
2011	2.9659895393987603
2012	8.47621744827059
2013	16.054304215503112
2014	15.994619025965573
2015	13.030126554128554
2016	8.489883854497572
2017	2.723547267577863
2018	8.07120232650404
2019	10.519243664109965
2020	5.067215250680021