 The average household size was 2.96 and the average family size was 3.31.A Williams Institute analysis of 2010 census data found there were about 3.2 same-sex couples per 1,000 households in the county.In the county, the population was spread out with 30.20% under the age of 18, 9.30% from 18 to 24, 29.80% from 25 to 44, 21.50% from 45 to 64, and 9.20% who were 65 years of age or older.