Year	% of total merchandise exports
1970	0.4707430653978538
1971	0.41144478600141876
1972	0.2509736045002164
1973	0.38493013669566273
1974	0.08086348134866224
1975	0.2013938391479172
1976	0.24192510616394286
1977	0.20701041402082804
1978	0.3768769463710717
1979	0.3407878757093975
1980	0.31237857004080044
1986	53.158213808353125
1987	57.141093268575304
1988	57.927349812431295
1989	65.93730326838974
1990	62.222268871078626
1991	2.4337169462768435
1992	13.226919759021053
1993	14.708047726978823
1994	13.464941784180542
1995	15.20245782475489
1996	10.905132308681614
1997	13.073611001054012
1998	20.644279309890624
1999	15.12834626456461
2000	12.421492979085189
2001	12.645120492038217
2002	13.66922594238638
2003	11.953039212249392
2004	12.310666358463672
2005	11.50691474283127
2006	13.05962343203895
2007	15.895264959858544
2008	15.318118813492474
2009	18.912598573059206
2010	16.557569799212313
2011	12.227363345778848
2012	14.303486654141167
2013	17.036293906942422
2014	17.86382586095994
2015	23.47144354574273
2016	24.32122746886272
2017	22.971778152023408
2018	19.807278174628493
2019	25.413577217589772
2020	25.413577196956886