Year	% of total merchandise exports
1960	19.14794136252372
1961	18.445742185630177
1962	15.772870662460567
1963	16.41394093362972
1964	15.219636055861194
1965	15.160113498175923
1966	15.287052726004186
1967	15.767854471815996
1968	15.437511083088683
1969	14.223252563304895
1970	13.881677824839459
1971	13.42285000531519
1972	13.191705203403822
1973	13.126244380580005
1974	17.305798148269748
1975	19.97328123653288
1976	17.332656465298427
1977	17.55642600696852
1978	17.047170316431977
1979	15.860825856364613
1980	18.401241034006034
1981	23.068222296654277
1982	18.351851776176797
1983	16.808084922511235
1984	15.664612910404257
1985	14.238315407692765
1986	12.077636174291635
1987	10.244076604091747
1988	9.83543575598224
1989	10.148321708057573
1990	9.957890629617031
1991	10.823728653601233
1992	11.360755246179778
1993	14.401834943899484
1994	13.486596840767328
1995	13.76027032490513
1996	14.609539187686904
1997	15.351662766018073
1998	14.324037390889039
1999	12.15674381705107
2000	13.12501401643991
2001	14.078015412487204
2002	14.44476210842332
2003	14.583731233576543
2004	15.392065576969854
2005	16.35212262770002
2006	17.03113981827464
2007	17.959876577936278
2008	19.667797833227755
2009	20.49168403691013
2010	21.35387266360107
2011	21.070489308832183
2012	21.43442292950198
2013	22.174959062326295
2014	20.972268639309018
2015	19.549816509150112
2016	19.02311763211525
2017	19.37932669436244
2018	18.58593894610992
2019	17.697333736333423
2020	17.120698457631217