As of the census of 2000, there were 6,299 people, 2,519 households, and 1,592 families residing in the city. The population density was 914.5 persons per square mile (353.0/km²). There were 2,702 housing units at an average density of 392.3 per square mile (151.4/km²). The racial makeup of the city was 75.33% White (U.S. Census), 22.38% African American (U.S. Census) or Race (United States Census), 0.24% Native American (U.S. Census), 0.57% Asian (U.S. Census), 0.08% Pacific Islander (U.S. Census), 0.24% from Race (United States Census), and 1.16% from two or more races. Hispanic (U.S. Census) or Latino (U.S. Census) of any race were 0.89% of the population.. How many more housing units are there than families?