were 16,515 housing units at an average density of 519.7/km 2 (1,345.9/mi 2 ). The racial makeup of the city was 81.59% White , 1.75% African American , 0.42% Native American , 7.40% Asian , 0.21% Pacific Islander , 4.49% from other races , and 4.15% from two or more races. Hispanic