Year	% of total merchandise exports
1960	0
1970	4.830450480213323
1981	7.356655599926549
1982	4.929216173002472
1983	5.052404424947214
1984	6.1627210780670705
1985	3.3985011299190973
1986	4.989659559124368
1987	10.647106965215599
1988	11.941948120722303
1989	14.117150058219579
1990	13.30509652026495
1991	13.183164954244472
1992	17.321682183530474
1993	4.041777690207378
1994	21.313003444734083
1995	9.396354643326642
1996	10.98330599456987
1997	2.0193887297243673
1998	3.3429454403783554
1999	4.165772926436933
2000	0.18303959326748837
2001	0.5036222220414734
2002	13.026377792628441
2003	10.219835472042108
2004	27.407465055171098
2005	19.67922690226293
2006	23.802636518592315
2007	14.728379533842888
2008	8.638346844838395
2009	8.652380770212101
2010	8.984604806217032
2011	10.407751732861888
2012	8.953974598320974
2013	8.422328670197391
2014	7.27557493849869
2015	9.980287387066497
2016	5.204954304595398
2017	4.914843605006728
2018	6.212426329751036
2019	6.245733146243083
2020	5.981438059332223