Kazakhstan has plenty of petroleum, natural gas, and mining. It attracted over $40 billion in foreign investment since 1993 and accounts for some 57% of the nation's industrial output. According to some estimates, Kazakhstan has the second largest uranium, chromium, lead, and zinc reserves, the third largest manganese reserves, the fifth largest copper reserves, and ranks in the top ten for coal, iron, and gold. It is also an exporter of diamonds. Kazakhstan has the 11th largest proven reserves of both petroleum and natural gas.