Year	% of total merchandise exports
1960	85.85485854858548
1961	91.93298169407385
1962	87.81773093614383
1963	84.0118187787262
1964	85.1494396014944
1965	76.8020144790683
1966	74.89742633345766
1967	83.34972140281874
1968	88.86877828054298
1969	90.49453508439103
1970	81.67332503765799
1971	89.49439965882638
1972	82.35044864243176
1973	82.61743488956031
1974	85.67088635360373
1975	79.60354753229957
1976	81.21580899257438
1977	82.22682730351379
1978	82.765090904191
1979	72.09258996039321
1980	76.1717107636427
1981	87.82918754850128
1982	85.56198670803052
1983	69.05313590070466
1984	77.72798415152222
1985	76.83924783769824
1986	76.77757766888787
1987	79.97442190926805
1988	81.07543639200696
1989	81.07543643344545
1990	83.93757667246092
1991	92.73836674398413
1992	76.49281452277226
1993	70.91657516224954
1994	71.43555210194627
1995	76.54482214571946
1996	74.78635196439693
1997	75.49869961302481
1998	78.83974391804527
1999	74.05793024554599
2000	82.5989714831688
2001	84.53448380466962
2002	85.93738101400848
2003	86.47101455007555
2004	82.11446507902998
2005	52.48360707299734
2006	49.96246398235627
2007	43.718555699090636
2008	33.897436802108
2009	34.92145913439176
2010	32.18708824772333
2011	40.69246005600433
2012	49.897387193891134
2013	57.134773554406436
2014	51.67025258514727
2015	52.976563927843344
2016	49.055141859176125
2017	42.542341539844784
2018	41.36190433392326
2019	47.039671606823276
2020	52.58760043655556