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American Community Survey (ACS) 1-Year estimates Every year the ACS produces single-year estimates for geographic areas with populations of 65,000 or more, with an annual sample size of about 3 million addresses. There are about 6,500 geographic areas that met the 65,000 or more population threshold for 1-year estimates. The geographic areas in 1-year estimates include: - All 2000 PUMAs (Public Use Microdata Areas) - School districts - States, counties, and places, including Census Designated Places (CDPs) - Congressional districts - Metropolitan and micropolitan statistical areas. 2005 ACS doesn’t include population in Group Quarter (GQ), but they are included in 2006 ACS and will be in subsequent years More documents:
http://www.census.gov/acs/www/Downloads/tp67.pdf
http://www.census.gov/acs/www/UseData/compACS.htm Group Quarter (GQ) is a living quarter in which unrelated people live or stay other than the usual house, apartment, or mobile home, etc. nursing homes, hospitals, prison wards, college dormitories, military barracks and shelters.
2005 ACS base tables are the first substantial set of data tables ever to appear based on the ACS. Summaries are for geographic areas of at least 65,000 population. The group quarter segment of the population was not covered in the 2005 survey, so all figures here summarize just the household population. There are no moving averages here, just tables based on a single year of surveys. These data were being released in "waves" during the summer and fall of 2006. Base tables were grouped in 4 waves as they were being released in different schedules: Wave1 - Demographic & Social Characteristics; Wave2 – Economic Characteristics; Waves3 – Housing Characteristics; Wave4 – Selected Population Profiles for Race, Ethnic, & Ancestry Groups. There two types of base table provide here, B table and C table; a C table is a collapsed version of a B table with the corresponding table-code.
The 2005 public use microdata sample (PUMS) is a subset of the 2005 American Community Survey (ACS) and Puerto Rico Community Survey (PRCS) samples. Note that microdata records in this sample do not contain names, addresses, or any information that can identify a specific housing unit, or person. The smallest geographic unit that is identified is the Public Use Microdata Area (PUMA). Maps for PUMAs can be found on the Census Bureau’s website at http://www.census.gov/geo/www/maps/puma5pct.htm. For 2005, the ACS selected a sample in all counties across the nation, including all municipios in Puerto Rico. The population estimates of the 2005ACS data were limited to the household population and exclude the population living in Group Quarters, etc. nursing homes, hospitals, prison wards, college dormitories, military barracks and shelters. The 2005 PUMS data contain 1,259,653 housing unit records and 2,913,796 person records, which is many more records than in previous years.
The 2006 ACS Summary File includes all detailed tables for all geographies published by the 2006 ACS, which contains a total of 1261 unique detailed tables (a.k.a. “base tables” with the letter “B”); of these tables, ID’s beginning with the letter “C” are collapsed versions of tables (i.e. these tables have fewer detailed cells). The 2006 ACS-SF includes the Group Quarters (GQ) population for the first time. The 2006 ACS-Summary File posted on our website only contains the estimate data, the margins of error data & standard errors data were not included here. The ACS-Summary File's FTP server of Census Bureau http://www2.census.gov/acs2006/Final_Summaryfile/ contains all 3 types of format data in ASCII files. For users who need to extract ACS-SF datasets by variables in SAS format, we recommend you the Missouri Census Data Center website http://mcdc2.missouri.edu/applications/uexplore.shtml#acs
The 2005 public use microdata sample (PUMS) is a subset of the 2006 American Community Survey (ACS) and Puerto Rico Community Survey (PRCS) samples. Note that microdata records in this sample do not contain names, addresses, or any information that can identify a specific housing unit, GQ or person. The smallest geographic unit that is identified is the Public Use Microdata Area (PUMA). Maps for PUMAs can be found on the Census Bureau’s website at http://www.census.gov/geo/www/maps/puma5pct.htm. For 2006, the ACS selected a sample of housing units (HUs) and Group Quarters (GQs) in all counties across the nation, and all municipios in Puerto Rico. The population sample is defined as all persons living in households selected in the housing unit sample, plus the persons selected from the GQ sample. The 2006 PUMS data contain 1,277,561 housing unit records and 2,923,336 person records from households and 81,151 person records from GQs To access 2006 ACS PUMS for other states, please contact data archivist, or visit http://factfinder.census.gov/home/en/acs_pums_2006.html
The 2007 ACS Summary File includes all detailed tables for all geographies published by the 2007 ACS, which contains a total of 1369 unique detailed tables (a.k.a. “base tables”). Of these tables, ID’s beginning with the letter “C” are collapsed versions of tables (i.e. these tables have fewer detailed cells). These detailed tables include both U.S. and Puerto Rico population and housing characteristics for the housing unit population and the Group Quarters (GQ) population. The 2007 ACS-Summary File posted on our website contains the estimate data & the margins of error data in SAS, SPSS & STATA format. For users who need to extract ACS-SF datasets by variables in SAS format, we recommend you the Missouri Census Data Center website http://mcdc2.missouri.edu/cgi-bin/uexplore?/pub/data/acs2007
The 2007 public use microdata sample (PUMS) is a subset of the 2007 American Community Survey (ACS) and Puerto Rico Community Survey (PRCS) samples. Note that microdata records in this sample do not contain names, addresses, or any information that can identify a specific housing unit, GQ or person. The smallest geographic unit that is identified is the Public Use Microdata Area (PUMA). Maps for PUMAs can be found on the Census Bureau’s website at http://www.census.gov/geo/www/maps/puma5pct.htm. Like the 2006 PUMS, the 2007 PUMS contains a sample of the group quarters (GQ) population which were not included in the 2005 PUMS. For 2007, the population sample is defined as all persons living in households selected in the housing unit sample, plus the persons selected from the GQ sample. The 2007 PUMS data contain 1,293,393 housing unit records and 2,946,342 person records from households and 81,679 person records from GQs. To access 2007 ACS PUMS for other states, please contact data archivist, or visit http://factfinder.census.gov/home/en/acs_pums_2007_1yr.html |
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