 Diamonds are the only of these mineral resources currently being developed; reported sales of largely uncut diamonds range between 20-30% of the CAR's export earnings.Industry contributes less than 20% of the country's GDP, with artesian diamond mining, breweries, and sawmills making up the bulk of the sector.Services currently account for 25% of GDP, largely because of the oversized government bureaucracy and high transportation costs arising from the country's landlocked position.