Year	% of merchandise imports
1962	29.332159905311123
1980	42.72395389380748
1981	30.94823290883784
1983	23.540049960952818
1984	22.768808464068005
1985	29.598181568294407
1986	30.36202367826902
1987	26.748350016377675
2009	29.322005833675796