Despite high industrial growth rates in the late 1970s and 1980s, manufacturing and mining have remained undeveloped. Paraguay manufactures little more than its own food products. The industrial boom climaxed in the middle of 1979 and was centered in hydroelectric power and related construction projects. Today the industry sector accounts for 21 percent of the national GDP. Of that 21 percent of GDP, more than 75 percent comes from the manufacturing of such goods as cement, sugar, textiles, beverages, and wood products. Manufacturing provides jobs for 13 percent of the workforce . Fully manufactured exports account for only 5 percent of all exports, but semi-processed agricultural goods make up 72 percent of all exports.