Year	% of merchandise exports
1966	1.7670791989705743
1968	3.942601161691582
1969	3.3144969100292005
1970	2.529100653354824
1971	3.336876921979357
1973	1.1768557221276623
1974	1.4270745445553128
1975	1.2359613607281872
1976	2.374188780822589
1977	1.0085195186935074
1978	0.9109605919191832
1979	0.7032901760051468
1980	0.46384754572352355
1981	0.5800708750887786
1982	0.6638022293320572
1983	0.6018966866503671
1984	0.5123631627931641
1985	0.39949809530078867
1986	0.7773890093709954
1987	0.4904921268861276
1992	0.3817985252331947
1993	0.30951789275754055
1994	0.3270715082588522
1995	0.5154642780378146
1996	0.6825642364013417
1997	0.5378617362399841
1998	0.7066258255591229
1999	0.46654920060371563
2000	0.25419661303932817
2001	0.3147531419022335
2002	0.42703994964769576
2003	0.38258743770885745
2004	0.41481980882862546
2005	0.49115221116711105
2006	0.7216483543134151
2007	0.5089164868320564
2008	0.632777159338741
2009	0.4704717268742413
2010	0.29121687605806
2011	0.2559459292071271
2012	0.24608003183096971
2013	0.16701183551026536
2014	0.17969070227830752
2015	0.3090616218033743
2016	0.2517750384231412
2017	0.1654014202275253