Wisconsin's self-promotion as ""America's Dairyland"" sometimes leads to a mistaken impression that it is an exclusively rural state. In fact, however, Wisconsin contains cities and towns of all sizes. Milwaukee is slightly larger than Boston and part of a largely developed string of cities that stretches down the western edge of Lake Michigan into greater Chicago and also into northwestern Indiana. Wisconsin produces more dairy products than any other state in the United States except California, and it leads the nation in cheese production. According to the 2004 U.S. Bureau of Economic Analysis report, Wisconsin?s gross state product was $211.7 billion. The per capita personal income was $32,157 in 2004.