 The racial makeup of the city was 93 @.@ 4 % White , 0 @.@ 9 % African American , 2 @.@ 8 % Native American , 1 @.@ 0 % Asian , 0 @.@ 1 % Pacific Islander , 0 @.@ 6 % from other races , and 1 @.@ 4 % from two or more races . Hispanic or Latino of any race were 1 @.@ 9 % of the population . The top six ancestry groups in the city were Norwegian ( 36 @.@ 4 % ) , German ( 34 @.@ 7 % ) , Irish ( 10 @.@ 6 % ) , French ( 6 @.@ 5 % ) , Polish ( 6 @.@ 2 % ) , English ( 6 @.@ 1 % ) . There were 21 @.@ 4 % of the population under the age of 18 , 22 @.@ 9 % from 18 to 24 , 27 @.@ 7 % from 25 to 44 , 18 @.@ 3 % from 45 to 64 , and 9 @.@ 8 % who were 65 years of age or older . The median age was 28 years . For every 100 females there were 102 @.@ 0 males . For every 100 females age 18 and over , there were 100 @.@ 2 males . 
