Year	% of total merchandise exports
1960	4.30379746835443
1962	3.5264483627204033
1963	2.3423423423423424
1964	2.2257551669316373
1965	2.411873840445269
1966	3.6885245901639343
1967	2.8455284552845526
1968	3.8229376257545273
1969	7.730677395087168
1970	6.701974539204316
1971	9.081161914704513
1972	7.2959680176744435
1973	9.579580535310779
1974	9.92215660710177
1975	10.139115683547882
1976	12.905610063622266
1977	16.98472118237529
1978	12.510126760358403
1979	10.30558064897295
1980	18.449503698204516
1981	19.537737212971518
1982	20.04026664544942
1983	23.61108836295144
1984	21.545839188493936
1985	22.749700925109945
1986	1.9325124905290092
1987	19.498291190709878
1988	16.61535319802344
1989	16.452077080883036
1990	0.570530669275377
1991	1.5989769418565243
1992	18.151133055362187
1993	7.581433905669326
1994	5.016389838478225
1995	14.73207924874155
1996	12.098523397362076
1997	11.102516989062844
1998	9.910938447137879
1999	8.996591725040123
2000	9.596206520838493
2001	8.975323035125545
2002	9.676162092082361
2003	10.352194927056859
2004	10.233604277767833
2005	11.984151776077503
2006	16.05306585637063
2007	15.940495691117428
2008	21.575616554114514
2009	18.128691340581128
2010	22.215191418345338
2011	25.35423608999345
2012	27.445789369543665
2013	33.37425479164736
2014	35.915256367464856
2015	32.36120557425311
2016	33.34457871082288
2017	24.054329311870738
2018	34.00001256181346
2019	30.951999447514773
2020	30.574872219341724