CDC/NCHS and Census
July 1 postcensal estimates are available for year 2011 and later; intercensal estimates are available for the years 2001 to 2009; census counts are used for the years 2000 and 2010
Starting in the 2000 decennial census, the U.S Census Bureau has used the 1997 Office of Management and Budget (OMB) revised standards for the classification of Federal data on race and ethnicity. Thus, race data on the 2000 and 2010 census are not comparable with race data from data systems that continue to collect data using the 1977 OMB standards. The 1977 standards specified four single-race categories: American Indian or Alaska Native, Asian or Pacific Islander, black, and white. The 1997 standards required that Federal data collection programs allow respondents to select one or more race categories when responding to a query on their racial identity. This provision means that there are potentially 31 race groups, depending on whether an individual selects one, two, three, four, or all five of the race categories. During the transition to full implementation of the 1997 OMB standards, race data on the 2000 and 2010 censuses were not comparable with race data on other data systems that were continuing to collect data using the 1977 OMB Standards on race and ethnicity. For example, states implemented the revised birth and death certificates, which have race and ethnicity items that are compliant with the 1997 OMB standards, at different times, and for a period of time some states were still collecting race and ethnicity in accordance with the 1977 OMB standards. To meet the need for comparability, the Centers for Disease Control and Prevention, National Center for Health Statistics (CDC, NCHS), in collaboration with the U.S. Census Bureau, developed methodology to bridge the race groups in Census 2000 and 2010 to the four single-race categories specified under the 1977 standards. To provide uniformity and comparability of data for trend comparison, bridged single-race categories are still used for some Healthy People applications.
U.S. Resident population