 The average household size was 2.31 and the average family size was 2.80.The county population contained 20.90% under the age of 18, 6.50% from 18 to 24, 22.40% from 25 to 44, 27.80% from 45 to 64, and 22.30% who were 65 years of age or older.The median age was 45 years.