people in 2,521 households, including 1,566 families, in the city. The population density was . There were 2,745 housing units at an average density of . The racial makeup of the city was 97.6% White, 0.3% African American, 0.1% Native American, 0.7% Asian, 0.2% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 1.2%. Of the 2,521 households 29.0% had children under the age of 18 living with them, 48.7% were married couples living together, 9.9% had a female householder with no husband present, 3.5% had a male householder with no wife present, and 37.9% were non-families. 32.2% of households were one person and 15.4% were one person aged 65 or older. The average household size was 2.30 and the average family size was 2.92. The median age was 41 years. 23.9% of residents were under the age of 18; 7.7% were between the ages of 18 and 24; 23.2% were from 25 to 44; 25.7% were from 45 to 64; and 19.7% were 65 or older. The gender makeup of the city was 46.8% male and 53.2% female. 2000 census At the 2000 census there were 6,014 people in 2,432 households, including 1,588 families, in the city. The population density was . There were 2,610 housing units at an average density of . The racial makeup of the city was 97.97% White, 0.28% African American, 0.05% Native American, 0.76% Asian, 0.22% from other races, and 0.71% from two or more races. Hispanic or Latino of any race were 0.50%. Of the 2,432 households 30.0% had children under the age of 18 living with them, 52.9% were married couples living together, 9.4% had a female householder with no husband present, and 34.7% were non-families. 30.3% of households were one person and 16.0% were one person aged 65 or older. The average household size was 2.35 and the average family size was 2.93. Age spread: 25.4% under the age of 18, 7.3% from 18 to 24, 25.9% from 25 to 44, 22.5% from 45 to 64, and 18.9% 65 or older. The median age was 39 years. For every 100 females, there were 88.6 males. For every 100 females age 18 and over, there were 82.8 males. The median household income was $36,554 and the median family income was $45,951. Males had a median income of $31,161 versus $21,597 for females. The per