 About 1.7% of families and 3.6% of the population were below the poverty line, including none of those under age 18 and 12.1% of those age 65 or over.As of the 2000 United States Census there were 3,969 people, 1,757 households, and 989 families residing in the city.The population density was 4,303.6 inhabitants per square mile (1,665.7/km2).