23.7% had children under the age of 18 living with them, 36.4% were married couples living together, 13.0% had a female householder with no husband present, and 46.6% were non-families. 34.1% of all households were made up of individuals, and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.24 and the average family size was 2.86. In the city, the age distribution of the population shows 19.8% under the age of 18, 24.6% from 18 to 24, 24.2% from 25 to 44, 18.3% from 45 to 64, and 13.2% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 89.9 males. For every 100 females age 18 and over, there were 86.5 males. The median income for a household in the city was $26,613, and the median income for a family was $36,398. Males had a median income of $30,445 versus $21,872 for females. The per capita income for the city was $15,814. About 14.3% of families and 23.1% of the population were below the poverty line, including 24.2% of those under age 18 and 9.7% of those age 65 or over. Economy From its early days as a regional trading center for the surrounding agricultural community to its first wave of industrial development brought on by the Indiana gas boom in the mid-1880s, Muncie has retained its ties to an industrial economy, and to a lesser extent its agricultural roots. In addition, the arrival of the forerunner to Ball State in the early twentieth century contributed to Muncie's development as an educational center, while Ball Memorial Hospital, established in 1929, led to the city's reputation as a healthcare center for east-central Indiana. Muncie's major industrial development included glass manufacturing, iron and steel mills, and automobile manufacturing and auto parts factories. Among its early major employers was the Ball Corporation, established by the Ball brothers of Buffalo, New York, who opened a glass factory in Muncie in 1888. Other notable manufacturers in addition to the Ball Corporation with operations in Muncie have included BorgWarner, The Broderick Company (aformer division of Harsco), Dayton-Walther Corporation, Delco Remy, General Motors, New Venture Gear, Hemingray Glass Company, Ontario Corporation, A. E. Boyce Company, Indiana Steel and Wire, and Westinghouse Electric. Changing industrial trends caused shifts in the city's economic development. As in many mid-sized