 The population density was 1,118.1 people per square mile (431.8/km²).There were 5,151 housing units at an average density of 508.9 per square mile (196.5/km²).The racial makeup of the city was 97.57% White, 0.14% African American, 0.13% Native American, 1.11% Asian, 0.04% Pacific Islander, 0.34% from other races, and 0.65% from two or more races.