Indiana is located in the Midwestern United States with an economy based primarily on its strong manufacturing sector. Industry gained its roots in the state from the mechanization of agriculture in the 19th century. Steel-making was introduced in the early 20th century, creating a base that allowed for automobile manufacturing to gain a strong foothold. Today, Indiana possesses a diverse industrial base active in steel refining, tool-making, metalworking, petrochemicals, and pharmaceuticals. Contrary to the declining trend of manufacturing prevalent in many states, Indiana’s manufacturing output has grown steadily in recent years. The state resides in regions known as the Corn Belt and Grain Belt of America, and Indiana is the fourth largest corn producer in the nation. The agricultural sector is also known as a leading producer of soybeans.