Year	% of total merchandise exports
1960	90.60887512899896
1961	89.8876404494382
1962	89.78174603174604
1963	92.69328802039082
1964	90.4
1965	91.22362869198312
1966	86.58536585365854
1967	88.16521048451152
1968	83.97435897435898
1969	84.52218415380784
1970	86.15057554702894
1971	83.07069503518393
1972	85.13420569209741
1973	85.8037538633533
1974	83.67647491354933
1975	73.4688637327796
1976	77.77123342974328
1977	82.88956258614226
1978	84.39463491518156
1979	87.90840223856907
1980	89.9207665643289
1981	89.21584301411744
1982	89.52560827019381
1983	84.85003238838104
1984	86.43309492746872
1985	85.02488385764771
1986	76.59730567326545
1987	76.67030516344772
1988	84.5958781586685
1989	60.19154953318287
1990	86.87120502010923
1991	86.07405207278194
1992	81.89628271333295
1993	84.2924618134746
1994	81.98193904734045
1995	82.94833713677761
1996	82.31836361829866
1997	80.44850727192528
1998	81.71819193490126
1999	80.88173216225276
2000	79.52212856153793
2001	80.58193916673395
2002	79.89140306002649
2003	77.17855386852018
2004	76.68887835355292
2005	77.91001142256852
2006	84.03300069134535
2007	71.99207598675005
2008	61.665833275202374
2009	66.02155702551214
2010	71.60621528373788
2011	60.12629425361825
2012	60.865953741671575
2013	70.63976457919384
2014	57.30691010707696
2015	52.03924576510451
2016	59.152385477966064
2017	57.82666957383634
2018	51.834256924502775
2019	53.193828636482465
2020	52.603363119491185