Year	% of total merchandise exports
1960	0.77319587628866
1961	0.165562913907285
1962	0.830564784053156
1963	0.36144578313253
1964	0.640204865556978
1965	3.49544072948328
1966	0.136612021857924
1968	2.26244343891403
1969	3.41104822834646
1970	3.01406941664082
1971	6.6049767179761
1972	4.01142027767699
1973	2.91937472412061
1974	4.98895677828113
1975	1.74199033318995
1976	3.03486311415302
1977	3.27434870459049
1978	3.23631797300949
1979	1.35620166527445
1980	1.65611834010663
1981	2.53420275513002
1982	1.84552156407883
1983	1.47888227516917
1984	1.84262526271485
1985	1.03511684451614
1986	0.814072622706745
1987	0.902012449723611
1988	0.986417785878789
1989	1.35034267490219
1990	1.95550056397761
1991	1.78357150582727
1992	2.73356576166955
1993	1.59943131351269
1994	3.51939691669612
1995	3.90238330994779
1996	5.00425692973069
1997	5.50576184376328
1998	6.03438086782003
1999	6.39388128579666
2000	7.19906322135314
2001	8.61453130603855
2002	6.87988207181917
2003	9.62356919165497
2004	8.45292988085409
2005	8.35223357746863
2006	8.40671864765242
2007	10.6169447247367
2008	11.3807839510937
2009	12.5396662208573
2010	13.4517377734146
2011	15.5371757408265
2012	18.648106908542
2013	16.3753928462716
2014	14.7108419955211
2015	17.2852435908673
2016	18.2343323609716
2017	20.0234402646095