As of the census of 2000, there were 33,828 people, 9,625 households, and 6,776 families residing in the county.  The population density was 7 people per square mile (3/km²).  There were 12,000 housing units at an average density of 3 per square mile (1/km²).  The racial makeup of the county was 80.8% Race (United States Census), 8.8% Race (United States Census) or Race (United States Census), 3.3% Race (United States Census), 0.7% Race (United States Census), 0.4% Race (United States Census), 3.2% from Race (United States Census), and 2.7% from two or more races.  13.8% of the population were Race (United States Census) or Race (United States Census) of any race. 13.8% were of German people, 12.1% Irish people, 10.5% English people, 8.7% United States and 5.0% Italian people ancestry according to Census 2000. 88.2% spoke English language and 10.3% Spanish language as their first language.. How many more housing units were there in the census of 2000 versus the number of families?