In Qatar, industrial production measures the output of businesses integrated in industrial sector of the economy. Mining is the most important sector and accounts for 83.6 percent of total production. The biggest segments within extraction of crude petroleum and natural gas. Manufacturing accounts for 15.2 percent, within chemicals and chemical products account for 10.4 percent, refined petroleum products for 2.1 percent and basic metals for 1.6 percent. Electricity, gas, steam and air conditioning account for 0.7 percent of total output and water supply, sewerage and waste management account for 0.5 percent.