Year	% of total merchandise exports
1960	58.08523058960887
1962	68.35114598134305
1963	74.93101823810485
1968	44.21456420576028
1969	46.37652148645594
1970	51.602807161861676
1971	52.27025766187071
1972	56.8734912544093
1973	60.97153617334825
1974	61.46329927787812
1975	62.2739820757316
1976	66.45239893906563
1977	65.58108352962493
1978	63.12858160033391
1979	62.38844474584803
1980	59.46518840909813
1981	61.07548227037506
1982	59.26507033204066
1983	59.07610824202349
1984	61.26377507478753
1985	61.84377947847557
1986	63.46090219710615
1987	65.52191761502779
1988	65.57755643329122
1989	66.21745581978202
1990	66.15382473160616
1991	65.60599397596837
1992	67.24611692281908
1993	65.65650215162975
1994	61.62955741460973
1995	61.90125494957104
1996	62.630787295426835
1997	63.65994021516232
1998	65.90311379207753
1999	64.62601479736044
2000	62.520313619373255
2001	62.10138901794362
2002	61.01724395578946
2003	55.627726154317095
2004	54.705513549094896
2005	53.45567121130933
2006	52.29692935096525
2007	50.958948616040686
2008	49.90101814617051
2009	51.34861190132397
2010	50.320411672608365
2011	48.955251861414865
2012	49.355100658740945
2013	48.424173627093474
2014	47.78975591943232
2015	48.43597153102153
2016	50.825039832606386
2017	49.71968010140248
2018	50.03176016790728
2019	50.21348140737859
2020	53.52681053461578