 About 2.8% of families and 3.6% of the population were below the poverty line, including 4.4% of those under the age of 18 and 2.9% of those age 65 and over.As of the 2000 census, there were 7,715 people, 2,634 households and 2,159 families living in the city.The population density was 435.6 people per square mile (168.2/km²).