Year	% of total merchandise exports
1960	0.08285004142502071
1961	0.15161086544535693
1962	0.07634559104211731
1971	0.1520232506147999
1972	0.170596921424736
1973	0.23075527978112975
1974	0.9561314084645993
1975	1.9033742900627342
1976	2.006777431439275
1977	1.3942233950310052
1978	1.2335475726233749
1979	2.0914968652037618
1980	2.779312702710195
1981	3.2513348419109205
1982	2.425337191154819
1983	3.092064089854286
1984	3.463952313411389
1985	3.7162226977889636
1986	2.685183002596283
1987	2.0006194895848313
1988	2.0875402592201673
1989	1.668342756843539
1990	3.3382678843231295
1991	3.154924376917341
1992	3.430948983595837
1993	3.4743417721647436
1994	2.7187837240312724
1995	2.41500897460973
1996	2.720038430195415
1997	2.461807620789609
1998	2.741254188753889
1999	2.9062749327051
2000	2.7387098033170525
2001	2.8968151848102566
2002	3.064911924348279
2003	2.96308431330469
2004	3.0197135096810968
2005	3.528492699506955
2006	4.08087276780273
2007	4.5534874919859
2008	5.008802871968191
2009	4.937883125650429
2010	5.0533184153949335
2011	5.978636409959122
2012	5.999354167697449
2013	5.097072821479616
2014	6.81843978120159
2015	6.320022885150893
2016	5.901730162960874
2017	5.413291293205061
2018	5.103870000657483
2019	4.78720642929218
2020	5.0212563233341525