“This table package presents annual and monthly income and earnings estimates at the individual, family and household level for 2011 from the Survey of Income and Program Participation. Annual and monthly estimates by selected demographic characteristics, such as gender, race and ethnicity, age, marital status and highest level of educational attainment, are reported. This survey collects information over a period of time on the incomes, earnings and the participation in government programs of the non-institutionalized U.S. population.”