Year	% of total merchandise exports
1973	84.90764695265027
1974	80.31958163858222
1975	80.04488714584852
1976	79.63437306341665
1977	80.1677044931173
1978	82.77941829270647
1979	80.99534263360786
1980	78.56857217617117
1981	72.91113647076335
1982	64.9644985127133
1983	72.62581943047415
1984	68.21359159875222
1985	68.87366768146956
1986	68.70400547020661
1987	69.51821672840136
1988	65.20873654563695
1989	65.6924378467206
1990	66.83508774264426
1991	50.1686539468563
1992	67.72791625333656
1993	77.21528203708121
1994	72.61176681585287
1995	2.7185682422022026
1996	71.05965370988808
1997	70.4821645489194
1998	70.18139657345004
1999	67.9722457806852
2000	4.945639173890125
2001	4.89198342719084
2002	4.88412017857304
2003	4.891806693757501
2004	4.891830247373596
2005	4.891469413274492
2006	4.892008931144674
2007	4.892219254980755
2008	4.892565098055219
2009	4.892219310606987
2010	4.8921187377025745
2011	4.884426917960765
2012	4.891514672521609
2013	4.891514667576248
2014	4.891514684653729
2015	4.465357523550302
2016	4.645772452291739
2017	4.413065171063547
2018	3.433717506983592
2019	3.4999833656963983
2020	5.482136378510204