To get data...

1. Go to the legacy American FactFinder.
2. Choose American Community Survey / Get data.
3. Use 2005-2009 American Community Survey 5-Year Estimates.
4. Choose Detailed Tables to the right under Select from the following. Accept the defaults under Select Geography (i.e. Nation, United States). Consider tables B11001 through B11001I for Household Type. You can easily find these tables by searching for Household Type (including living alone) on the by keyword tab.

You may need to know the difference among a family, a non-family, and a household. Use the American FactFinder Glossary to find out.