As of the census of 2000, there were 16,447 people, 5,664 households, and 4,400 families residing in the city. Recent estimates show the population at 21,329 as of 2005. The population density was 385.5 people per square mile (148.9/km²). There were 5,782 housing units at an average density of 135.5 per square mile (52.3/km²). The racial makeup of the city was 97.18% White, 0.43% African American, 0.37% Native American, 0.49% Asian, 0.01% Pacific Islander, 0.48% from other races

Race (United States Census)

Race and ethnicity in the United States Census, as defined by the Federal Office of Management and Budget and the United States Census Bureau, are self-identification data items in which residents choose the race or races with which they most closely identify, and indicate whether or not they are...

, and 1.02% from two or more races.