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Technical Tables

A subset of tables in the ACS provide information about technical details about how each survey was administered.

Because the ACS is a survey, data reported are estimates, not exact counts. Some tables included in each release provide information about the underlying details. This data is mostly used by the Census Bureau to monitor the accuracy and reliability of the ACS and to inform updates to the survey design and methodology. We include them in Census Reporter because it's easier to keep them when we process the other data than to skip over them. If you're using them for anything, let us know.

Unweighted Count

The ACS has an annual sample size of about 3.5 million addresses. The Unweighted Count tables indicate the actual number of people and households responding to the survey for each geography.

Code Title
B00001 Unweighted Sample Count of the Population
B00002 Unweighted Sample Housing Units

Quality Measures

Tables beginning with 98 organize various data which survey methodology experts can use to assess the quality of data collected by the ACS. Data in these tables is limited to large summary levels: the nation, individual states, and occasionally counties and/or places. Most users of Census Reporter will not have any need to use these tables.

Code Title
B98001 Unweighted Housing Unit Sample
B98002 Unweighted Group Quarters Population Sample
B98011 Housing Unit Coverage Rate
B98012 Total Population Coverage Rate by Sex
B98013 Total Population Coverage Rate by Weighting Race and Hispanic or Latino Groups
B98014 Group Quarters Population Coverage Rate
B98021 Housing Unit Response and Nonresponse Rates With Reasons for Noninterviews
B98022 Group Quarters Population Response and Nonresponse Rates With Reasons for Noninterviews
B98031 Overall Person Characteristic Allocation Rate
B98032 Overall Housing Unit Characteristic Allocation Rate

Imputations

Imputation is the process of correcting for "non-response": that is, when answers on the ACS questionnaire are not completed, or are completed with invalid values. Allocation is one strategy for responding to the non-response, by using statistical procedures to impute ("fill in") missing values.

Tables beginning with 99 provide the allocation rate for nearly every question on the ACS questionnaire. Values are available for nearly all summary levels.

Code Title
B99011 Allocation of Sex
B99012 Allocation of Age
B99021 Allocation of Race
B99031 Allocation of Hispanic or Latino Origin
B99051 Allocation of Citizenship Status
B99052§ Allocation of Year of Entry
B99053 Allocation of Year of Naturalization
B99061 Allocation of Place of Birth
B99071 Allocation of Mobility Status for the Population 1 Year and Over
B99072 Allocation of Residence 1 Year Ago for the Population 1 Year and Over
B99080 Allocation of Means of Transportation to Work
B99081 Allocation of Place of Work
B99082 Allocation of Private Vehicle Occupancy
B99083 Allocation of Time Leaving Home to Go to Work
B99084 Allocation of Travel Time to Work
B99085 Allocation of Vehicles Available for Workers
B99086 Allocation of Means of Transportation to Work
B99087 Allocation of Time Arriving at Work From Home
B99088 Allocation of Travel Time to Work
B99089 Allocation of Vehicles Available for Workers
B99092 Allocation of Relationship
B99102 Allocation of Grandparents Living With Grandchildren
B99103 Allocation of Grandparents Responsible for Grandchildren
B99104 Allocation of Length of Time Grandparent Responsible for Own Grandchildren
B99121 Allocation of Marital Status
B99122 Allocation of Divorced
B99123 Allocation of Married
B99124 Allocation of Widowed
B99125 Allocation of Times Married
B99126 Allocation of Year Last Married
B99131 Allocation of Marital Status for Females 15 to 50 Years
B99132 Allocation of Fertility of Women 15 to 50 Years
B99141 Allocation of School Enrollment
B99142 Allocation of Grade Enrolled Enrolled in School
B99151 Allocation of Educational Attainment
B99152 Allocation of Field of Degree for Population 25 Years and Over
B99161 Allocation of Language Status
B99162 Allocation of Language Spoken at Home
B99163 Allocation of Ability to Speak English
B99171 Allocation of Poverty Status for Unrelated Individuals
B99172 Allocation of Poverty Status for Families
B99181 Allocation of Disability Items for the Civilian Noninstitutionalized Population
B99182 Allocation of Hearing Difficulty for the Civilian Noninstitutionalized Population
B99183 Allocation of Vision Difficulty for the Civilian Noninstitutionalized Population
B99184 Allocation of Cognitive Difficulty for the Civilian Noninstitutionalized Population 5 Years and Over
B99185 Allocation of Ambulatory Difficulty for the Civilian Noninstitutionalized Population 5 Years and Over
B99186 Allocation of Self-care Difficulty for the Civilian Noninstitutionalized Population 5 Years and Over
B99187 Age by Allocation of Independent Living Difficulty for the Civilian Noninstitutionalized Population 15 Years and Over
B99191 Allocation of Individuals' Income - Percent of Income Allocated
B99192 Allocation of Household Income - Percent of Income Allocated
B99193 Allocation of Family Income -- Percent of Income Allocated
B99194 Allocation of Nonfamily Household Income -- Percent of Income Allocated
B99201 Allocation of Earnings - Percent of Earnings Allocated
B99211 Allocation of Veteran Status
B99212 Allocation of Period of Military Service for Civilian Veterans 18 Years and Over
B99221 Allocation of Food Stamps/SNAP Receipt
B99231 Allocation of Employment Status
B99232 Allocation of Work Status
B99233 Allocation of Usual Hours Worked Per Week
B99234 Allocation of Weeks Worked
B99241 Allocation of Industry for the Civilian Population
B99242 Allocation of Occupation for the Civilian Population
B99243 Allocation of Class of Worker for the Civilian Population
B99244 Allocation of Industry for the Full-time, Year-round Civilian Population
B99245 Allocation of Occupation for the Full-time, Year-round Civilian Population
B99246 Allocation of Class of Worker for the Full-time, Year-round Civilian Population
B992510 Allocation of Kitchen Facilities
B992511 Allocation of House Heating Fuel
B992512 Allocation of Vehicles Available
B992513 Allocation of Telephone Service Available
B992514 Allocation of Meals Included in Rent
B992515 Allocation of Contract Rent
B992516 Allocation of Rent Asked
B992518 Allocation of Gross Rent
B992519 Allocation of Value
B99252 Allocation of Tenure
B992520 Allocation of Price Asked
B992521 Allocation of Mortgage Status
B992522 Allocation of Mortgage Status and Selected Monthly Owner Costs
B992523 Allocation of Selected Monthly Owner Costs for Owner-occupied Housing Units
B99253 Allocation of Vacancy Status
B99254 Allocation of Rooms
B99255 Allocation of Units in Structure
B99256 Allocation of Year Structure Built
B99257 Allocation of Year Householder Moved Into Unit
B99258 Allocation of Bedrooms
B99259 Allocation of Plumbing Facilities
B992701 Allocation of Health Insurance Coverage
B992702 Allocation of Private Health Insurance
B992703 Allocation of Public Health Insurance
B992704 Allocation of Employer-based Health Insurance
B992705 Allocation of Direct-purchase Health Insurance
B992706 Allocation of Medicare Coverage
B992707 Allocation of Medicaid/Means-tested Public Coverage
B992708 Allocation of Tricare/Military Health Coverage
B992709 Allocation of VA Health Care
B99281 Allocation of Household Internet Access
B99282 Allocation of Household Computer Type
B99283 Allocation of Household Internet Subscription Type
§Tabulated for Puerto Rico. Add 'PR' to the table code. Column names may vary slightly from non-PR version.