America is changing so is the Census. 1790 Decennial Census 1850 Population Characteristics 1940 Introduction of sampling. 1960 Mailout/Mailback 1980 Block Data 1990 TIGER/LINE files 2000 Paid Promotional Campaign 2006 American Community Survey 2010 – Short-form only.
Decennial Census • In Census 2000, the census used two forms • “Long” Form – Collected the same information as the short form but also collected more in-depth information such as income, education, and language spoken at home • “Short” Form – Asked for basic demographic and housing information, such as age, sex, race, how many people lived in the housing unit, and if the housing unit was owned or rented • Only a small portion of the population, called a sample, received the long form.
2010 Census Short form only Same basic demographic questions as 2000. Same geographic detail as 2000
2010 Census and American Community Survey • 2010 Census will focus on counting the U. S. population • The sample data are now collected in the ACS • Puerto Rico is the only U. S. territory where the ACS is conducted • 2010 Census will have a long form for U. S. territories such as Guam and U. S. Virgin Islands • Same “short form” questions on the ACS
American Community Survey: Data from the ACS can be grouped into four categories Demographic Social Economic Housing
American Community Survey: Demographic Characteristics • Sex • Age • Race • Hispanic Origin
Education Marital Status Fertility Grandparents Veterans Disability Status Place of Residence 1-year ago Citizenship Year of Entry Language Spoken at Home Ancestry / Tribal Affiliation American Community Survey: Social Characteristics
American Community Survey: Economic Characteristics • Income • Benefits • Employment Status • Occupation • Industry • Commuting to Work • Place of Work
American Community Survey: Housing Characteristics • Tenure • Occupancy and Structure • Housing Value • Taxes and Insurance • Utilities • Mortgage / Monthly Rent
American Community Survey: 2008 Content Changes • Three new questions • Health Insurance Coverage • Veteran’s Service-related Disability • Marital History • Deletion of one question 1. Time and main reason for staying at the address • Changes in some wording and format
American Community Survey: Methodology • Sample includes about 3 million addresses each year • Three models of data collection: 1. Mail 2. Phone 3. Personal Visit • Data are collected continuously throughout the year • High levels of quality have been demonstrated
American Community Survey: Period Estimates • ACS estimates are period estimates describing the average characteristics over a specified period • Contrast with point-in-time estimates that describe the characteristics of an area on a specific date • 1-year, 3-year, and 5-year estimates will be released for geographic areas that meet specific population thresholds
Weighted Census 2000 Sample & 2000 ACS Housing Units by Response Week
Most ACS questions do not stipulate a period of time that should be referenced Interpretation is yearly average since the data are collected each month and averaged across months Questions with no specific reference period
Other questions specify a period of time relative to the date of interview Interpretation is still a yearly average but covering a slightly different period of time than the calendar year Questions with a specific reference period relative to interview date
Comparing ACS 1 and 3 year • 3-Year Estimates • The 2006-2008 ACS 3-year estimates are based on data collected between January 2006 and December 2008. • Published for selected geographic areas with populations of 20,000 or greater • Represent the average characteristics over the 3-year period of time • Have larger sample size than the 1-year estimates • Are less current than the 1-year estimates 1-Year Estimates The 2008 ACS 1-year estimates are based on data collected between January 2008 and December 2008. Published for selected geographic areas with populations of 65,000 or greater Represent the average characteristics over calendar year 2008 Have smaller sample size than the 3-year estimates Are more current than the 3-year estimates
American Community Survey: Data Products • Profiles • Data Profiles • Narrative Profiles • Comparison Profiles • Selected Population Profiles • Tables • Detailed Tables • Subject Tables • Ranking Tables • Geographic Comparison Tables • Thematic Maps • Public Use Microdata Sample (PUMS) Files
Selected Population Profiles • Population sub-group must meet same population criteria as geographic areas. • Race or Ethnic Groups • Ancestry Groups • Country of Birth
Subject Tables • Pre-tabulated summary tables on a wide variety of topics • Include cross-tabulations by age, sex, race, ethnicity, and other characteristics • Missing cells due to sample size restrictions
Subject Tables • Housing Financial Characteristics • Housing Physical Characteristics • Income • Mobility • Relationships • Transportation • Veterans Age and Sex Aging Children Education Employment Fertility Grandparents Group Quarters Population Housing
Subject Tables on Employment Source: http://factfinder.census.gov.
Sample Subject Table Source: http://factfinder.census.gov