sentences:  However the Pew Research Center found household income declined less than individual income in the twenty-first century, because those no longer able to afford separate housing moved in with relatives, creating larger households with more earners.A 2011 CBO study adjusted for household size so that its quintiles contain an equal number of people, not an equal number of households.CBO found income distribution over a multi-year period "modestly" more equal than annual income, confirming earlier studies.