Manufacturing production measures the output of businesses operating in the manufacturing sector. In India, manufacturing accounts for 78 percent of total industrial output. The biggest segments are: basic metals (13 percent of total production); coke and refined petroleum products (12 percent); chemicals and chemical products (8 percent); food products (5 percent); pharmaceuticals, medicinal chemical and botanical products (5 percent); motor vehicles, trailers and semi-trailers (5 percent); machinery and equipment n.e.c. (5 percent); other non-metallic mineral products (4 percent); and textiles, electrical equipment and fabricated metal products (3 percent each).