Year	% of total merchandise exports
1967	1.0425488180883864
1968	0.92580896830999
1969	0.8704988838202466
1970	1.289337870662367
1971	1.4018777220555987
1972	1.119733407904549
1973	1.0194091828957397
1974	1.7676582779267096
1975	1.8200702049616764
1976	1.3188381987208175
1977	1.557843870448139
1978	1.3125041310831465
1979	1.580479226362325
1980	1.583475622129309
1981	1.8364434780392922
1982	1.7481431532513088
1983	1.501827379043647
1984	1.6802105516111678
1985	1.5378863458306749
1986	1.392399900685968
1987	1.461174839665574
1988	2.1710617969358483
1989	2.1702995874223885
1990	2.3928918001144655
1991	2.2412601282314357
1992	2.538825676408505
1993	2.5616001482390307
1994	2.3883797964326994
1995	2.472221211515607
1996	2.2366636662752843
1997	2.1415848453786084
1998	2.366733221831438
1999	2.148410870396728
2000	1.924905621520796
2001	2.1863932164199507
2002	2.3788480936586645
2003	2.6606520553687276
2004	2.87313708847452
2005	2.762169809821739
2006	2.8649656947937157
2007	3.3114617299714544
2008	4.234760366889708
2009	4.3158254642988805
2010	4.095817269104595
2011	4.001649843400251
2012	3.7212364782276555
2013	3.579381945952573
2014	3.228657404727448
2015	3.0953549260344673
2016	3.1569303435860077
2017	2.7795740425180298
2018	2.5283635542619205
2019	2.4744878112085473
2020	2.1988902619689776