Year	% of total merchandise exports
1960	0.513575921649813
1961	0.715414690957491
1962	0.886875024205104
1963	0.86673058485139
1964	0.933583269011651
1965	0.5907081249547
1966	0.323035793851181
1967	0.896656000562608
1968	0.342067214444405
1969	0.627243265846604
1970	0.489036125571857
1972	0.0159948816378759
1974	0.0209111820272936
1976	0.00215985053834275
1977	0.00525917199596096
1978	1.07122967557356
1979	1.41801155468821
1980	1.39663354204957
1981	1.74833390827871
1982	0.483576104263726
1983	0.698068451372416
1984	0.329315272772462
1985	1.12058636972302
1986	1.02234902520209
1988	0.553231932606668
1989	0.590783282112007
1990	0.501844752603644
1991	0.555935568913663
1992	0.432477296701579
1993	0.616015420838374
1994	0.359483581808159
1995	0.483856997772025
1996	0.494365551215849
1997	0.530635906964868
1998	0.934302025445771
1999	0.0192095279258512
2000	0.301490355045178
2001	0.465059292976751
2002	0.617372795722849
2003	0.781928924255451
2004	0.920062129393851
2005	1.10410002858802
2006	0.813313488039675
2007	6.62076281775338
2008	8.35091647989956
2009	10.4921984317086
2010	18.2869027652716
2011	21.4586159164724
2012	33.266529446841
2013	34.8906962021252
2014	31.4107810395198
2015	30.9261876430777
2016	32.6719864173808
2017	33.3960771568755