 16.00% of all households were made up of individuals and 4.50% had someone living alone who was 65 years of age or older.The average household size was 2.89 and the average family size was 3.25.31.20% of the county's population was under age 18, 6.70% was from age 18 to 24, 37.30% was from age 25 to 44, 18.60% was from age 45 to 64, and 6.20% was age 65 or older.