Year	% of total merchandise exports
1977	96.30815407703852
1978	91.18991043684885
1979	89.32531097890751
1980	92.40144918535059
1981	90.34936383353063
1982	83.89755192169042
1983	87.52213027396321
1984	90.36236597257069
1985	91.3702965811737
1986	90.54499234275674
1987	85.86035683375194
1988	89.7670338123004
1989	86.26721109652061
1990	87.0688496454902
1991	82.86254122179105
1992	80.20925755142275
1993	76.13223293215934
1994	73.2671017988018
1995	68.88452383158572
1996	77.39840080463058
1997	71.1207247906528
1998	77.16791327962672
1999	77.56854291817234
2000	76.29815874011832
2001	73.890769031703
2002	76.89719549062708
2003	79.24449701216052
2004	86.82304592626764
2005	71.77577805006592
2006	73.32960167617867
2007	59.10519310255942
2008	60.244761881677746
2009	72.01244398954742
2010	38.14752272594507
2011	57.80019639516863
2012	62.797265986981934
2013	65.51733418134339
2014	72.89434641589409
2015	65.29911474697722
2016	68.56425490999352
2017	31.41667031798167
2018	20.627951168688604
2019	23.407512639503206
2020	21.669655844689697