Year	% of total merchandise exports
1976	4.308147182418196
1977	9.3047628930165
1978	14.125408201284328
1979	9.953412054264701
1980	6.901528327720831
1981	5.2787207895244865
1982	28.494725838639173
1983	28.494725836883745
1984	28.494725833523617
1985	28.494725839216684
1986	20.737021182880213
1987	19.245070268114233
1988	19.830905154872717
1989	16.20433625706944
1990	13.651816332111405
1991	11.775633848392102
1992	13.330360344067351
1993	14.738207289837135
1994	15.467699545436172
1995	14.980386306674479
1996	14.35522146958169
1997	13.822588634990963
1998	17.245461268652306
1999	15.712523884822103
2000	13.747066895712024
2001	13.511970450656523
2002	13.089623680773924
2003	12.947447428469117
2004	12.37095464024532
2005	13.322662958492524
2006	11.880338499531993
2007	11.114820553219214
2008	10.378647791449193
2009	9.09942140960955
2010	8.291089833559532
2011	9.952186979227816
2012	9.11188305933887
2013	9.54122016368375
2014	9.981484061352724
2015	9.545021647823475
2016	8.791826712809767
2017	9.414751357874476
2018	20.03747513861417
2019	20.373745344779316
2020	25.18021195531242