 This pattern was accelerated with the export of bauxite beginning in the 1950s.The economic structure shifted from a dependence on agriculture that in 1950 accounted for 30.8 percent of GDP to an agricultural contribution of 12.9 percent in 1960 and 6.7 percent in 1970.During the same period, the contribution to GDP of mining increased from less than 1 percent in 1950 to 9.3 percent in 1960 and 12.6 percent in 1970.