Year	% of total merchandise exports
1960	74.41037735849056
1961	84.30232558139535
1962	78.98900597005188
1963	98.45758354755783
1964	100
1965	100
1966	100
1967	100
1968	100
1969	100
1970	100
1971	32.06106870229007
1972	59.640221402214024
1973	41.51994103677013
1981	88.61786020738907
1982	92.71784772025585
1983	89.85018947432447
1984	88.70720665232045
1985	27.90529810884943
1986	31.20470842299767
1987	29.59567969524666
1988	30.080582877679273
1989	26.595135352907768
1990	42.20302387786926
1991	73.76935190671703
1992	64.43403663184448
1993	68.62378184880605
1994	70.98804074522984
1995	72.81151811778975
1996	74.72829448424368
1997	76.43105868599002
1998	75.64544002654351
1999	72.22425837634816
2000	70.88291833526465
2001	71.03314691368448
2002	74.61516330431157
2003	76.14547066016601
2004	73.39554390001358
2005	71.22600266646334
2006	72.82566585115225
2007	73.31346527343446
2008	70.82256852615822
2009	68.7705346738798
2010	69.54053819225557
2011	66.34315769682806
2012	67.61006256660467
2013	68.9127476686111
2014	70.11253102295078
2015	71.19141283843231
2016	70.33454659827214
2017	65.56072889996113
2018	65.29463521304832
2019	67.31085769322704
2020	67.87019664174827