 The average household size was 2.77 and the average family size was 3.21.In the city, the population was spread out with 27.9% under the age of 18, 13.7% from 18 to 24, 24.9% from 25 to 44, 18.3% from 45 to 64, and 15.2% who were 65 years of age or older.The median age was 31 years.