Excerpt: "A distinct geographical pattern emerges with respect to which metropolitan areas had the highest shares of adults who were lower income, middle income or upper income in 2014. The 10 metropolitan areas with the greatest shares of middle-income adults are located mostly in the Midwest. Wausau, WI, where 67% of adults lived in middle-income households in 2014, had the distinction of leading the country on this basis, followed closely by Janesville-Beloit, WI (65%). Sheboygan, WI, and four other Midwest areas also placed among the top 10 middle-income areas. Beyond a shared geography, the top 10 middle-income metropolitan areas are more rooted in manufacturing than the nation overall. Elkhart-Goshen, IN, for example, derived 56% of its gross domestic product (GDP) in 2014 from the manufacturing sector alone. Likewise, the manufacturing sector’s share was 40% in Sheboygan, WI, and more than 20% in Wausau, WI, Lebanon, PA, Ogden-Clearfield, UT, and Kankakee, IL. Overall, manufacturing accounted for only 12% of the nation’s GDP in 2014."