 The average household size was 2.77 and the average family size was 3.23.In the city the population was spread out with 31.4% under the age of 18, 9.1% from 18 to 24, 31.5% from 25 to 44, 19.7% from 45 to 64, and 8.3% who were 65 years of age or older.The median age was 31 years.