Year	% of total merchandise exports
1963	39.40733038731479
1964	53.136854391596145
1965	57.45889387144992
1966	62.04317161786707
1967	60.35870315014946
1968	71.7963953258071
1969	43.10143232972815
1970	42.779439760674464
1972	23.9560737527115
1973	23.36131095123901
1974	20.25197306494823
1975	52.070321535970386
1976	31.628366691376332
1977	29.85854581493828
1978	57.54929577464789
1979	78.53184483174043
1980	80.18892852424364
1981	76.50321074138937
1982	66.00648796312105
1983	66.00648795157605
1984	66.00648795163086
1985	66.00648796718733
1986	66.00648797420139
1987	66.00648796305649
1988	66.0064879677316
1989	52.93796723172301
1990	42.077481539850794
1991	44.63695628146987
1992	39.707677661853886
1993	40.49615049781191
1994	46.36038325956988
1995	41.18015783941381
1996	44.02027525235752
1997	0.1889404218073388
1998	0.250167326236875
1999	0.24700054186611642
2000	20.796026299446442
2001	21.044302210481405
2002	20.82940183055936
2003	20.68905576157332
2004	20.68880960238003
2005	20.68508477742811
2006	20.68279297622495
2007	20.6828286273544
2008	20.682889485174606
2009	20.682733036516847
2010	20.682882135712806
2011	20.682913376791404
2012	20.682768786578436
2013	20.682932026766327
2014	20.682938982617767
2015	20.682832781023937
2016	20.68042884941207
2017	10.863159662066764
2018	11.996512533650451
2019	0.9751798355038741
2020	0.5438142205886549