Year	% of merchandise exports
1970	88.33420235317196
1971	85.76178193805794
1972	91.79246355006573
1973	67.64198050673387
1974	95.05167652250776
1975	88.70383442297575
1980	97.57854127337929
1981	97.41003362897011
1982	94.33586490913468
1983	96.46762968300597
1984	94.01180178291338
1990	79.08339641873444
1991	71.04215960302724
1994	75.1889443079225
2000	57.06797520794895
2006	46.65847520965222
2007	61.53620265513858
2009	73.51857676909773
2010	83.89334101788236
2011	85.31843247602406