The economy of the state of Indiana is reflected in its gross state product in 2017 of US$359 billion and per capita income of $44,165. A high percentage of Indiana's income is from manufacturing. Indiana has been the largest steel producing state in the U.S. since 1975, with the Calumet Region of northwest Indiana being the largest single steel producing area in the U.S., accounting for 27% of all U.S. steel production. Indiana is also the 2nd largest auto manufacturing state. Indiana's other manufactures include pharmaceuticals and medical devices, automobiles, electrical equipment, transportation equipment, chemical products, rubber, petroleum and coal products, and factory machinery.