Year	% of total merchandise exports
1960	3.2186338252735625
1961	2.8135830062711604
1962	3.163429972635486
1963	3.603902025986258
1964	4.6475636667313465
1965	5.586608362580157
1966	5.678199739131424
1967	5.6794789357747
1968	6.4977486743071
1969	6.756399728970557
1970	6.677938864891236
1971	8.933395672407192
1972	7.592619452587641
1973	7.471180589335871
1974	7.1635608517179135
1975	8.544944819840913
1976	8.185907426301121
1977	7.999199476165007
1978	7.933875491620319
1979	7.938544272026425
1980	7.84536685646401
1981	8.083182777513304
1982	7.619953798887748
1983	6.3298062202741185
1984	6.622159948426767
1985	6.191271635339517
1986	7.3615883824184785
1987	7.021201605451183
1988	6.8607059067287794
1989	7.401757289627565
1990	7.288398895237702
1991	7.747245870238941
1992	9.578540071927025
1993	10.814599519950677
1994	10.907644388611187
1995	10.50822709839058
1996	10.541088466363192
1997	11.30201488872597
1998	11.145639056696563
1999	8.711235710016654
2000	8.781399491999887
2001	9.263575065343643
2002	8.56407951945513
2003	8.927194434494508
2004	9.41171549888638
2005	9.713581399076375
2006	9.89085101429553
2007	10.712460092062678
2008	11.516909380074571
2009	11.33035763085486
2010	11.886279605666942
2011	11.768635085595026
2012	11.468056603296523
2013	11.314959289460297
2014	10.584512630076146
2015	10.525808395438684
2016	10.458287029918877
2017	10.624651109809962
2018	10.189818535650119
2019	9.611461156524209
2020	8.892527576487264