Passage: As of the census of 2000, there were 1,651 people, 666 households, and 440 families residing in the county. The population density was 0.39 people per square mile (0.15/km²).  There were 1,025 housing units at an average density of 0.25 per square mile (0.09/km²).

Question: How many families lived in the county in 2000?
440