Year	% of total merchandise exports
1981	4.464385337313345
1982	3.119335155144148
1983	4.025620820617306
1984	2.596391812623996
1985	4.587726629906562
1986	5.736622447500859
1987	3.011415003664126
1988	3.839145513309255
1989	5.662805397138139
1990	3.4743791413033276
1991	3.70438549832012
1992	11.092397931379066
1993	3.1785804646905227
1994	1.5295157783744022
1995	8.105373384212534
1996	5.556468016436143
1997	6.736070863112345
1998	14.529960705361097
1999	10.819792476862126
2000	6.654072218654683
2001	4.034005206512562
2002	3.2699752140490377
2003	1.6686957127643964
2004	1.8252183492908094
2005	6.146676428241506
2006	25.699006235453975
2007	9.920739695393586
2008	11.162817595204473
2009	4.478945800229726
2010	10.514726409691113
2011	11.101423308308076
2012	9.203966612468138
2013	4.393413976448434
2014	5.970361926349
2015	5.353795396987
2016	3.9416294970546404
2017	3.7258868587958993
2018	2.1043766308161014
2019	1.1660796781069471
2020	1.4783190635446393