 20.90% of all households were made up of individuals and 5.60% had someone living alone who was 65 years of age or older.The average household size was 2.84 and the average family size was 3.31.The county population contained 33.50% under the age of 18, 9.00% from 18 to 24, 29.20% from 25 to 44, 21.40% from 45 to 64, and 7.00% who were 65 years of age or older.