 29.60% of all households were made up of individuals and 8.60% had someone living alone who was 65 years of age or older.The average household size was 2.38 and the average family size was 2.97.The county population contained 20.80% under the age of 18, 26.80% from 18 to 24, 24.30% from 25 to 44, 17.30% from 45 to 64, and 10.90% who were 65 years of age or older.