were 20,432 housing units at an average density of 6,494.2 per square mile (2,507.4 /km 2 ). The racial makeup of the city was 45.06% (31,440) White , 10.64% (7,425) African American , 1.07% (745) Native American , 4.36% (3,040) Asian , 0.04% (27) Pacific Islander , 33.37% (23,284) from other races