 There were 76,922 housing units at an average density of 135.5 per square mile (52.3 square kilometers).78.3% of the population were White, 15.3% Black or African American, 1.6% Asian, 0.5% Native American, 0.1% Pacific Islander, 1.8% of some other race and 2.4% of two or more races.4.5% were Hispanic or Latino (of any race).