As of the census of 2000, there were 35,100 people, 12,759 households, and 9,071 families residing in the county. The population density was 59 people per square mile (23/km²). There were 15,035 housing units at an average density of 25 per square mile (10/km²). The racial makeup of the county was 85.8% Race (United States Census), 3.9% Race (United States Census) or Race (United States Census), 1.8% Race (United States Census), 1.0% Race (United States Census), 0.1% Race (United States Census), 5.0% from Race (United States Census), and 2.4% from two or more races. 8.9% of the population were Race (United States Census) or Race (United States Census) of any race. 14.9% were of German people, 12.6% English people, 11.7% Irish people, 8.8% Italian people and 7.3% United States ancestry according to Census 2000. 93.1% spoke English language and 5.1% Spanish language as their first language.. How many fewer households were there than housing units?