Year	% of total merchandise exports
1972	13.70703452480756
1973	9.45752933598454
1974	12.820808914807008
1975	14.680525833078569
1976	11.547874731531891
1977	14.188376753507015
1978	7.337697763229678
1979	8.189799713440845
1980	11.03306883328904
1981	13.981171415934796
1982	9.815639403171627
1983	5.620738205007868
1984	4.45654041054711
1985	10.723903532921543
1986	7.397824301672837
1987	5.233098068350669
1988	3.4806719695150754
1989	4.511362746919192
1990	3.123913598741085
1991	1.1182810754789008
1992	1.2637442384055713
1993	1.648220753427023
1994	1.7960268672484596
1995	1.6921193367917378
1996	1.7837215984312191
1997	1.8171179756452132
1998	0.9885022679586646
1999	0.7611894434633434
2000	0.5491981574193974
2001	0.366455167358444
2002	0.7083790374377994
2003	0.6852655522706439
2004	0.617487739585266
2005	0.475398677767464
2006	0.30905510106423006
2007	0.4265066669405654
2008	0.5678079464551298
2009	0.559552539563465
2010	0.6258328192917407
2011	0.5698161317352404
2012	0.5347883665161195
2013	0.47155818153932294
2014	0.3722407921435798
2015	0.4591401856929229
2016	0.3795023403939703
2017	0.5308626405300622
2018	0.5061223025318904
2019	0.442641913924296
2020	0.5483284215134338