population density was 687.3/km² (1,780.2/mi²). There were 15,960 housing units at an average density of 244.7/km² (633.9/mi²). The racial makeup of the area was 79.46% White , 3.93% African American , 0.11% Native American , 13.37% Asian , 0.01% Pacific Islander , 0.90% from other races , and 2.22% from two