Passage: As of the 2010 United States Census, there were 44,159 people residing in the county. 93.2% were White, 2.0% Native American, 1.1% Black or African American, 0.9% Asian, 0.2% of some other race and 2.7% of two or more races. 1.1% were Hispanic or Latino (of any race). 20.7% were of German, 11.2% Norwegian, 9.7% Swedish, 7.8% Irish, 6.4% Finnish and 6.1% Polish ancestry.As of the census of 2000, there were 43,287 people, 17,808 households, and 11,272 families residing in the county. The population density was 33 people per square mile (13/km²). There were 20,356 housing units at an average density of 16 per square mile (6/km²). The racial makeup of the county was 95.35% White, 0.57% Black or African American, 1.82% Native American, 0.63% Asian, 0.03% Pacific Islander, 0.20% from other races, and 1.41% from two or more races. 0.73% of the population were Hispanic or Latino of any race. 17.8% had German, 13.5% Norwegian, 11.5% Swedish, 8.5% Irish, 8.2% Finnish, 6.8% Polish and 5.1% United States or American ancestry. 96.7% spoke English and 1.2% Spanish as their first language.

Question: What is the kilometer equivalent of the population density?
13/km²