Year	% of total merchandise exports
1962	48.148148148148145
1963	86.36363636363636
1964	93.68191721132898
1966	86.8995633187773
1967	81.31991206117003
1968	79.90467961760362
1969	80.2539911051698
1970	71.99502686381598
1971	79.60858093891592
1972	81.03786999962578
1973	64.4352824888149
1974	72.3972092766732
1981	72.39720926559342
1982	72.39720928768416
1983	72.39720927612923
1984	72.39720928033933
1985	53.13444027852169
1986	64.66313866014856
1987	67.05497109921163
1988	68.36115576076554
1989	70.03207782568404
1990	61.41453186428837
1991	69.8591352094471
1992	78.44308917788454
1993	81.01025072036886
1994	83.37956958103024
1995	80.80892450595665
1996	80.05573462776245
1997	85.58264575311925
1998	83.68075106237515
1999	79.17143551590124
2000	80.14496291456626
2001	85.1543396442629
2002	88.48015201240855
2003	86.7212630488138
2004	88.5406695111168
2005	64.25465930415211
2006	65.80209728303824
2007	66.03394005223738
2008	83.48633158148508
2009	70.97372800495056
2010	53.857529192063616
2011	56.89360878769908
2012	47.147134898573526
2013	42.07024822026445
2014	50.09568592125855
2015	52.770946589318534
2016	44.751632705978686
2017	49.29310508212634
2018	46.493065369194476
2019	41.24782015131465
2020	38.264216795296946