Types of Household Members as Percent of All Doubled-Up Households

Type of Household Member        2003            2009
Adult Child (over 21)                   47.4%            50.5%
Other Relative                            17.9%            15.0%
Grandchild                                  12.7%            14.1%
Roommate                                  12.2%            10.8%
Other non-relative                       11.6%            10.0%
Sibling                                          9.0%            9.8%
Parent                                          8.5%            9.8%
Lodger                                          2.4%            2.9%

Source: U.S. Department of Housing and Urban Development (2014). Analysis of Trends in Household Composition Using American Housing Survey Data. Washington DC: Author. Retrieved from: http://bit.ly/1e5yQ2g