 About 10.2% of families and 17.0% of the population were below the poverty line, including 19.8% of those under age 18 and 14.5% of those age 65 or over.At the 2000 census, there were 20,336 people, 7,967 households, and 5,736 families in the county.The population density was 37 people per square mile (14/km²).