 The average household size was 3.24 and the average family size was 3.63.The county population contained 37.23% under the age of 20, 6.56% from 20 to 24, 28.13% from 25 to 44, 19.92% from 45 to 64, and 8.15% who were 65 years of age or older.The median age was 29.2 years.