Write an article that answers the following question: How many more housing units are there than families?
As of the census of 2000, there were 325,957 people, 149,937 households, and 94,460 families residing in the county.  The population density was 570 people per square mile (220/km2).  There were 182,467 housing units at an average density of 319 per square mile (123/km2).  The racial makeup of the county was 92.65% Race (United States Census), 4.18% Race (United States Census) or Race (United States Census), 0.22% Race (United States Census), 0.77% Race (United States Census), 0.03% Race (United States Census), 1.14% from Race (United States Census), and 1.02% from two or more races.  4.34% of the population were Race (United States Census) or Race (United States Census) of any race. 89.7% spoke only English language at home; 4.4% spoke Spanish language, 1.3% German language, and 1.0% French language at home.