Year	% of total merchandise exports
1972	3.03711607347001
1973	6.259276892486067
1974	10.000288691936834
1975	16.154081320697035
1976	9.70480994955297
1977	9.157261892205463
1978	12.446418829397553
1979	9.732341554126148
1980	12.661832263943202
1981	13.52751626966576
1982	9.939327656693488
1983	16.196891477790352
1984	13.359958773511982
1985	14.400985093453734
1986	9.003161174922097
1987	6.1710624071322435
1988	5.342606863755005
1989	4.726029860443882
1990	4.178883302459385
1991	5.369164612895278
1992	4.928920338877765
1993	2.9888670167413407
1994	3.0987310001762784
1995	2.6313622934187206
1996	2.2476425242261064
1997	2.7614497471367354
1998	1.8266720227326987
1999	1.498775863327665
2000	1.0301950428287516
2001	1.3015986707523977
2002	1.5926634265693567
2003	1.1315043743487063
2004	0.8296180076841726
2005	0.9251432589108697
2006	0.7121287969621887
2007	0.694886293720673
2008	0.7400821435144683
2009	0.6750870346346824
2010	1.1026662785536645
2011	0.7956362760154548
2012	0.6146719702675049
2013	0.5891718224870998
2014	0.4078366458493257
2015	0.3677019337050051
2016	0.31480644525612295
2017	0.3220373589730525
2018	0.27706058370693426
2019	0.25230532246948123
2020	0.30479206167758294