 18.40% of all households were made up of individuals and 7.40% had someone living alone who was 65 years of age or older.The average household size was 2.79 and the average family size was 3.18.The county population contained 30.20% under the age of 18, 7.10% from 18 to 24, 32.20% from 25 to 44, 20.70% from 45 to 64, and 9.80% who were 65 years of age or older.