population density was 563.9/km² (1,460.3/mi²). There were 18,907 housing units at an average density of 243.8/km² (631.5/mi²). The racial makeup of the city was 47.71% White , 48.49% African American , 0.23% Native American , 1.40% Asian , 0.03% Pacific Islander , 0.90% from other races , and 1.24% from two