Year	% of total merchandise exports
1964	0.016025641025641024
1975	0.1147747954549181
1976	0.25045153521974717
1978	0.018169521636872018
1979	0.0783348254252462
1980	0.003649801542041152
1981	0.04237451365615008
1982	0.04237451365597786
1983	0.0423745136578962
1984	0.04237451365867156
1985	0.04237451365492485
1986	0.7468865855840487
1987	0.696991282234309
1989	0.011848728983012332
1990	0.0638927265116769
1991	0.07370863611195148
1992	0.36599053809963
1993	0.46484750234493555
1994	0.2992240511037084
1995	0.6482657574895077
1996	0.6483381161496757
1997	0.47696462736412043
1998	0.0061801297799666125
1999	0.18073352406104568
2000	0.9985988198961673
2001	1.0080736320046495
2002	0.9809672518736887
2003	1.0556948415989071
2004	1.1465129283121658
2005	1.3039537239124623
2006	1.5844217935839497
2007	1.7097302710905167
2008	0.9994370318274097
2009	1.7162584162526588
2010	1.0127820242888392
2011	1.3081515734250364
2012	1.430127539515088
2013	1.5110546530562334
2014	0.25693158311624353
2015	0.11581043544385573
2016	0.16046314040842857
2017	0.1605408737696778
2018	0.401539123293724
2019	0.18264690417565926
2020	0.12851944789781666