Year	% of total merchandise exports
1973	2.9841766440045725
1974	9.754018981212482
1975	1.0250002892213006
1976	3.8628382565585624
1977	6.549149601908362
1978	5.626001196610889
1979	7.014243191515894
1980	5.283061717180195
1981	6.773921456746631
1982	9.113429784412498
1983	7.268218237314001
1984	12.740694768818706
1985	12.399367460472346
1986	11.85426199886488
1987	10.227149763333578
1988	12.790308202989722
1989	11.225972729229259
1990	10.745503152930983
1991	0.4149140807825734
1992	0.8438541966178934
1993	0.09978515331272506
1994	0.6898166678069005
1995	94.41217314884
1996	0.02603927587548568
1997	6.647553591617433E-05
1998	0.0006342024342997348
1999	8.65455952103763E-09
2000	89.81304723325519
2001	88.839058653431
2002	88.84589123266016
2003	88.83967554298296
2004	88.83891248288947
2005	88.827382401883
2006	88.83904939865016
2007	88.84007468141166
2008	88.84915008879639
2009	88.84007461993107
2010	88.83824906515198
2011	88.84543384090222
2012	88.82727903482626
2013	88.82727903205337
2014	88.82727900846963
2015	89.78742480827184
2016	89.89254843190318
2017	90.15037116841971
2018	91.03499023669933
2019	91.03219347209435
2020	89.11136857953296