In the county, the population was spread out with 22.00% under the age of 18, 7.10% from 18 to 24, 22.80% from 25 to 44, 26.90% from 45 to 64, and 21.30% who were 65 years of age or older. The median age was 44 years. For every 100 females there were 98.70 males. For every 100 females age 18 and over, there were 96.60 males. The median income for a household in the county was $36,449, and the median income for a family was $44,381. Males had a median income of $35,452 versus $24,628 for females. The per capita income for the county was $19,517. About 8.90% of families and 12.50% of the population were below the poverty line, including 17.10% of those under age 18 and 6.80% of those age 65 or over. As of the 2010 United States Census, there were 71,404 people, 31,329 households, and 19,713 families living in the county. The population density was . There were 35,582 housing units at an average density of . The racial makeup of the county was 87.0% white, 5.1% American Indian, 1.4% Asian, 0.8% black or African American, 0.1% Pacific islander, 1.8% from other races, and 3.8% from two or more races. Those of Hispanic or Latino origin made up 5.1% of the population. In terms of ancestry, 21.4% were German, 16.4% were English, 12.6% were Irish, 6.5% were Norwegian, and 5.2% were American. Of the 31,329 households, 22.7% had children under the age of 18 living with them, 49.4% were married couples living together, 9.2% had a female householder with no husband present, 37.1% were non-families, and 30.4% of all households were made up of individuals. The average household size was 2.22 and the average family size was 2.70. The median age was 49.0 years. The median income for a household in the county was $44,398 and the median income for a family was $54,837. Males had a median income of $44,609 versus $32,125 for females. The per capita income for the county was $24,449.