Year	% of total merchandise exports
1960	63.12056737588653
1961	61.083743842364534
1963	50
1964	58.18452380952381
1965	59.94208494208494
1966	56.89149560117303
1967	58.973241523577094
1968	64.01456786664798
1969	60.73867163252638
1970	57.77353342428376
1971	62.54918032786885
1972	56.76278072452319
1973	49.293181668748765
1981	83.77551838862763
1982	80.07376156672603
1983	79.13251643158486
1984	73.50242858330328
1985	65.85879693119843
1986	58.33295871415189
1987	57.57949583458846
1988	58.555319347739434
1989	52.95610556269652
1990	48.09467866219089
1991	52.60846505970081
1992	57.63648741071928
1993	53.862481259696324
1994	55.567144153630856
1995	47.90787855095208
1996	57.438556083574944
1997	47.03887903332368
1998	47.301530774067544
1999	43.524595010050845
2000	48.79245375619532
2001	47.54062199740044
2002	51.11033858599199
2003	43.47275827411522
2004	54.249357249053034
2005	54.86513325308948
2006	44.41777345676183
2007	47.42310496478389
2008	47.24143817017529
2009	44.61407483456982
2010	44.544915392808115
2011	36.77811166874893
2012	41.18096526638901
2013	52.19123850555341
2014	53.07440760829144
2015	51.99023882857704
2016	43.912857946373435
2017	45.22967270053556
2018	48.76195396536649
2019	42.90242408375433
2020	41.6366184216855