Year	% of total merchandise imports
1978	0.04346539414789331
1980	0.15585747244296333
1981	0.30466239800282013
1982	0.4588829267003251
1983	0.4186535501070101
1984	0.29398845623309466
1985	0.19962241232385913
1986	0.48688169260133934
1987	0.5194029988871588
1988	0.5521019076060348
1989	0.5651823085529769
1990	0.3111898296220154
1991	0.22944155899325877
1992	4.933867163686686
1993	6.293067443812905
1994	4.432348365685444
1995	3.828256773832313
1996	4.592940575319002
1997	3.633467920626323
1998	3.1128126224311714
1999	3.2221333832172725
2000	3.374225824358832
2001	4.065777383635714
2002	3.705411251015435
2003	3.3269623210157473
2004	3.003160914461379
2005	3.2601626471897993
2006	2.998907534475812
2007	3.0828736058896427
2008	3.1932059686196905
2009	3.271465200370558
2010	3.294750506991126
2011	3.9152180012977844
2012	4.219256777598028
2013	3.94099242748679
2014	3.6905025202357487
2015	3.5866575110503445
2016	3.2440374718457843
2017	3.5378101046323134
2018	4.081827592395609
2019	4.489164851253051
2020	4.405920404220827