 The average household size was 2.28 and the average family size was 2.80.The county population contained 20.9% under age of 18, 7.3% from 18 to 24, 21.1% from 25 to 44, 31.6% from 45 to 64, and 19.1% who were 65 years of age or older.The median age was 46 years.