Year	% of total merchandise exports
1960	0.401167031363968
1961	0.5435964340073929
1962	0.38861584181049263
1963	0.3626186646335227
1964	0.34960429671811
1965	0.5254424568166259
1966	0.4746773590068633
1967	0.4796457660736542
1968	0.45049046356103195
1969	0.7617680860124725
1970	0.6019547230084697
1971	0.661239016579172
1972	1.0117817742896147
1973	1.1088908181725587
1974	3.3672386441669246
1975	3.2151044714065655
1976	4.942330057495885
1977	6.761245405329379
1978	1.4956917643857748
1979	5.340303132918105
1980	4.854432061521559
1981	5.8701637216024745
1982	5.653864222861817
1983	5.846854889592152
1984	6.034040825272121
1985	5.893253000363295
1986	6.6149788491820765
1987	6.531417557786446
1988	4.6480451700250125
1989	4.216880722227173
1990	3.719478634460642
1991	4.715012347116894
1992	4.223003616220076
1993	4.42764477046046
1994	4.200795086581924
1995	3.797721505565199
1996	3.5453390100819964
1997	3.1299196088477226
1998	3.8318385793051255
1999	3.236685329977138
2000	3.4252117231463584
2001	3.0773427360283354
2002	4.599860980968707
2003	3.659639302604581
2004	3.6555024032666075
2005	4.129664480441215
2006	3.8016511505098105
2007	3.68305676940598
2008	4.625368628817232
2009	5.763338135281904
2010	6.798082168831406
2011	5.672566664817656
2012	6.319900424130368
2013	6.925533200289142
2014	8.964687070063592
2015	13.066501327647515
2016	10.749986467886025
2017	8.864786027720104
2018	7.1540033374646015
2019	6.986124669769341
2020	8.20545351866309