 Of the total wheat produced in the country, 50 percent is exported, valued at US$9 billion.Midwestern states also lead the nation in other agricultural commodities, including pork (Iowa), beef and veal (Nebraska), dairy (Wisconsin), and chicken eggs (Iowa).Chicago is the largest economic and financial center of the Midwest, and has the third largest gross metropolitan product in the United States—approximately $532 billion, according to 2010 estimates, after the urban agglomerations of New York City and Los Angeles.