In Germany, industrial production measures the output of businesses integrated in industrial sector of the economy. Manufacturing is the most important sector and accounts for 79 percent of total production. The biggest segments within Manufacturing are: machinery and equipment (12 percent of total production); motor vehicles, trailers and semi-trailers (12 percent); basic metals and fabricated metal products (10 percent); and computers, electronic and optical products and electrical equipment (10 percent). Construction accounts for 11 percent of total output; and energy production accounts for 10 percent.