Year	% of total merchandise imports
1963	0.014784151389710232
1964	0.011661807580174927
1965	0.022732439190725165
1970	0.016603021749958494
1973	0.04470022908867408
1974	0.002904022070567736
1975	0.01350329480393216
1976	0.008856409763306124
1977	0.010539332789972175
1978	0.11063086815094794
1979	0.011190350893110977
1980	0.022061881770013923
1981	0.027013349785131806
1982	0.036187769744119795
1983	0.05722991929309604
1984	0.022675954226510427
1985	0.06166576036685521
1986	0.08902857164785362
1987	0.08620664800297544
1988	0.11868257721294519
1989	0.0932679249377162
1990	0.07976134678823779
1991	0.12342311508790835
1992	0.26426603686696903
1993	0.17358706084032346
1994	0.32120737849907516
1995	0.3342245989304813
1997	0.1711735163006587
1998	0.08239064083535315
1999	0.11164171041318936
2000	0.2773653195344972
2001	0.3070339033630391
2002	0.36040103980731836
2003	1.3267327430959408
2004	1.1839866423125522
2005	0.9584044612378381
2006	0.5634781429758825
2007	0.30211388216388535
2008	0.4503318220543307
2009	1.1662518263198751
2010	0.9824842849119213
2011	2.773514723487441
2012	1.8908961899184655
2013	2.5053483696919243
2014	1.845862110171118
2015	0.8831104023985934
2016	0.6680615519977032
2017	0.855254877305326
2018	1.6551193125797539
2019	1.3733055329684434
2020	1.3286429818648982