On February 15, nearly 2,000 Census Bureau field representatives began interviewing about 100,000 households across the nation for the Annual Social and Economic Supplement (ASEC) to the monthly Current Population Survey (CPS). Results from the CPS-ASEC collected in February through April of each year enable the following high-profile indicators to be updated annually by the Census Bureau: median household income, official poverty rate and percentage of people without health insurance coverage. The Census Bureau's monthly Current Population Survey, which dates from 1942, is the longest-running household survey in the country. More information about this survey can be found on our website.