Year	% of total merchandise imports
1974	0.2857142857142857
1977	4.0431266846361185
1978	1.338432122370937
1979	2.941176470588235
1980	2.9282576866764276
1981	0.14084507042253522
1982	3.194444444444444
1983	1.0075566750629723
1984	2.553191489361702
1985	13.407134071340712
1986	4.12465343939907
1987	5.514113913364344
1988	6.135490445118751
1989	8.233118544553992
1990	4.420212117073062
1991	4.655005563620795
1992	7.5354728728438225
1993	7.750222723951043
1994	4.988431781017261
1995	5.871880798543978
1996	4.011464859660287
1997	3.942112593983041
1998	3.1862980459387056
1999	2.9538189804895176
2000	2.8883203086246345
2001	2.608522214398196
2002	4.034880364494741
2003	3.7254533426837275
2004	5.423994846390105
2005	8.673300368820431
2006	7.346437461814273
2007	6.7997555108465475
2008	6.9471960561015855
2009	5.365962555458753
2010	5.005425407206946
2011	4.791866278152324
2012	5.27931816629097
2013	5.179152624900993
2014	4.507887129323119
2015	5.076528835456852
2016	4.186273569216383
2017	3.9428021947668
2018	3.90726695134019
2019	3.93530148947402
2020	3.5822869269838034