Year	% of total merchandise exports
1960	0.27472527472527475
1974	0.025589570229902086
1975	0.007040171216963997
1976	0.010530749789385004
1977	0.010141707310327024
1978	0.06613529391555296
1979	0.05520428796097185
1980	0.6990358598095446
1981	0.6912974637026833
1982	0.06665503558663143
1983	0.11936552270775734
1984	0.08357538225461719
1985	0.07310963219404155
1986	0.054019014693172
1987	0.16998783306263351
1988	0.1300410248471244
1989	0.1470122046663819
1990	0.24343515046632663
1991	0.26987894132814527
1992	0.3684343785624786
1993	0.6802943763641126
1994	0.7963342758158767
1995	0.8974066395313408
1996	0.9243271187345821
1997	1.1305586762833502
1998	1.2234344540858444
1999	1.1243438284597556
2000	1.157146959918439
2001	1.146805235505212
2002	1.340443277493203
2003	1.1203800913664355
2004	1.2225838331740537
2005	1.18646896474127
2006	1.3689245600619686
2007	1.4276189109510313
2008	1.46355149861172
2009	1.4870725506539035
2010	1.9045236919995692
2011	1.6389980687675985
2012	1.6233458880609581
2013	1.7514915158420616
2014	1.874345556803485
2015	1.9190366021024914
2016	2.0801995681276764
2017	1.8923883098249172
2018	1.6555786329451376
2019	1.7699154679621127
2020	1.7465323058817788