Write an article that answers the following question: How many more households than families were in the county in 2000?
As of the census of 2000, 458,336 people, 181,153 households, and 115,394 families resided in the county.  The population density was 587 people per square mile (227/km²).  There were 196,633 housing units at an average density of 252 per square mile (97/km²).  The Race (United States Census) of the county was 84.78% White, 9.38% African American, 0.86% Native American, 2.09% Asian, 0.03% Pacific Islander, 0.89% from other races, and 1.97% from two or more races. Hispanics or Latinos of any race were 2.44% of the population. About 17.5% were of Italian people, 16.2% Irish people, 12.4% Germans, 9.4% English people, and 6.0% Polish people ancestry according to Census 2000, and 91.4% spoke English language, 2.4% Spanish language and 1.1% Italian language as their first language.