Demographics As of the census of 2000, there are 15,527 people, 6,505 households, and 3,798 families residing in the city. The population density is 481.5/km² (1,246.7/mi²). There are 6,970 housing units at an average density of 216.2/km² (559.6/mi²). The racial makeup of the city is 96.84% White, 0.36% African American, 1.21% Native American, 0.49% Asian, 0.05% Pacific Islander, 0.27% from other races, and 0.78% from two or more races. 1.19% of the population are Hispanic or Latino of any race.
There are 6,505 households out of which 27.3% have children under the age of 18 living with them, 46.8% are married couples living together, 8.8% have a female householder with no husband present, and 41.6% are non-families. 37.0% of all households are made up of individuals and 16.2% have someone living alone who is 65 years of age or older. The average household size is 2.17 and the average family size is 2.85.
In the city the population is spread out with 21.7% under the age of 18, 12.7% from 18 to 24, 25.7% from 25 to 44, 21.8% from 45 to 64, and 18.1% who are 65 years of age or older. The median age is 39 years. For every 100 females there are 92.0 males. For every 100 females age 18 and over, there are 88.4 males.
The median income for a household in the city is $31,500, and the median income for a family is $42,245. Males have a median income of $28,310 versus $20,225 for females. The per capita income for the city is $16,686. 10.7% of the population and 6.5% of families are below the poverty line. Out of the total people living in poverty, 12.4% are under the age of 18 and 10.8% are 65 or older.