Year	% of total merchandise exports
1960	3.88486400780583
1961	3.7628714990649152
1962	3.7216132356228546
1963	4.604314656630443
1964	10.662991972316032
1965	12.479828041782946
1966	8.186683558762853
1967	6.577565407349351
1968	8.056540433770467
1969	9.488949145510686
1970	9.87465080785495
1971	9.483382246106977
1972	11.258622589278087
1973	10.973257838444326
1974	10.316542153396009
1975	5.5285400394353905
1976	4.414327198404047
1977	4.045162644977205
1978	3.48620334678865
1979	3.8579765217861413
1980	4.256515528715978
1981	7.579073513996342
1982	7.089192988127917
1983	6.666090132695013
1984	6.004736902257079
1985	5.29312354991229
1986	5.334290734214435
1987	5.645339948023832
1988	4.942176278350678
1989	6.302728417360992
1990	7.169464366501929
1991	6.515784847084354
1992	8.695356152675283
1993	10.179932570372644
1994	11.92715240236301
1995	12.206404834686472
1996	12.665341851887032
1997	13.210739878952591
1998	12.595106674083024
1999	13.515028816856118
2000	17.286819236912606
2001	14.7700562889985
2002	16.660683662728978
2003	15.925529118570738
2004	15.92894736896741
2005	15.031272052987754
2006	14.754308293745645
2007	14.233801188228831
2008	14.194817283357192
2009	17.394059365110365
2010	19.73839338257661
2011	19.800642896004337
2012	21.871881542795897
2013	22.789165655641312
2014	22.87730377546511
2015	25.20791154279514
2016	25.37338722331402
2017	22.929863776219044
2018	22.27582410900859
2019	23.514595814765244
2020	22.572056081957