INTRODUCTION OF STF 1990
o Universe:
Information from the censuses were derived either from questions asked
of the entire population or from questions asked of only a sample of the
population. Those questions asked about every person and housing unit
are called 100-percent or short-form questions. The others are called
sample or long-form questions.
Those households receiving the short-form questionnaires were asked only
the 100-percent questions, and those receiving the long form were asked
both the 100-percent questions and the sample questions. In 1990, some
17.7 million housing units received a long form, out of an estimated
total of 106 million units (about 16.7%). Sampling rates vary depending
on geographic location and population size.
PUMS datafiles contain a sample of the individual long-form census
records showing most population and housing characteristics with
identifying information removed.
STF datafiles contain pre-tabulated results (counts) of the short or
long form census records. STF datafiles may contain census information
at very small geographic areas.
100-PERCENT COMPONENT (Short-Form)
Population
Household Relationship, Sex, Race, Age, Marital Status, Hispanic
Origin.
Housing
Number of units in structure, Number of rooms in unit, Tenure
(owned or rented), Value of home (or monthly rent), Congregate
housing (meals included in rent), Vacancy characteristics.
SAMPLE COMPONENT (Long-Form)
Population: Social Characteristics
Education (enrollment and attainment), Place of birth,
Citizenship, Year of entry to U.S., Ancestry, Languague (spoken
at home), Migration (residence between decennial censuses),
Disability, Fertility, Veteran Status.
Population: Economic Characteristics
Labor force, Occupation, Industry, Class of worker, Place of
work, Journey to work, Work experience, Income, Year last worked.
Housing
Year moved into residence, Number of bedrooms, Plumbing, Kitchen
facilities, Telephone in unit, Vehicles available, Heating Fuel,
Source of water, Method of sewage disposal,Year structure built,
Farm residence, Shelter costs (including utilities).
o Design and Methodology:
The coding system varies for each census, so it is important to have
access to the codebook for each census in order to assess the meaning of a
specific field in a census record and its comparability across censuses.
Very little comparability exists between geographic identifiers on each of
the previous files, but housing and population characteristics are
similar. Because of this similarity, census datafiles can be
useful for analysis of trends.
The sample questionnaires were edited for completeness and consistency,
and substitutions or allocations for any missing data were made.
Allocation flags may appear within microlevel data to indicate when an
item has been allocated. Tabulated data may contain imputation fields
for selected tables.
o Variables (reported in PUMS):
o Items in the housing record might include:
allocation flags for housing items; bedrooms; condominium status;
contract rent; cost of utilities; family income; family, subfamily, and
relationship recodes; farm status and value; fire, hazard, flood
insurance; fuels used; gross rent; house heating fuel; household
income; household type; housing unit weight; kitchen facilities;
linguistic isolation; meals included in rent; mortgage status and
selected monthly owner costs; plumbing facilities; presence and age of
own children; presence of subfamilies in household; property value;
real estate taxes; rooms; sewage disposal; source of water; state;
telephone in housing unit; tenure; units in structure; vacancy status;
vehicles available; year householder moved into unit; and year
structure built.
o Items in the person record might include:
ability to speak English; age; allocation flags for population items;
ancestry; children ever born; citizenship; class of worker; disability
status; educational attainment; Hispanic origin; hours worked; income
by type; industry; language spoken at home; marital status; means of
transportation; migration PUMA; migration state; military status,
periods of active duty military service, veteran period of service;
mobility status; occupation; person's weight; personal care limitation;
place of birth; place of work PUMA; place of work state; poverty
status; race; relationship; school enrollment and type of school; time
of departure for work; travel time to work; vehicle occupancy; weeks
worked; work status; work limitation status; and year of entry.
Summary Tape Files (STF) are designed to provide statistics with greater
subject detail for geographic areas than is feasible or desirable to provide
in printed reports. The census data contained in printed reports are arranged
in tables. Population and housing characteristics are presented for specified
geographic areas; for example a table may represent the number of rented
housing units in a census tract, the number of persons 65 years of age or
older in a city, or the total population of a county. Census data at the
small-area level, such as census tracts and smaller, will contain limited
subject matter detail. STF files, in machine readable format, mimic this
table layout.
Introduction to Summary Tape File 3.
This database consists of four sets of computer-readable data files
containing detailed tabulations of the nation's population and housing
characteristics. The files contain sample data inflated to represent the
total United States population. The file also contains 100 % counts and
unweighted sample counts of persons and housing units. This series is
comprised of STF3A, STF3B, STF3C, and STF3D. All files in the STF3 series
are identical, containing 3,300+ table cells, as well as standard
geographic identification variables. Population items tabulated for each
person include demographic data and information on schooling, ethnicity,
labor force status, children, and details about occupation and income.
Housing items include data on size and condition of the housing unit as
well as information on value, age, water, sewage and heating, vehicles,
and monthly owner costs. Each file provides different geographic coverage.
STF3A
provides summaries for the divisions (MCDs) or census county divisions
(CCDs), places or place segments within MCD/CCDs and remainders within
MCD/CCDs, census tracts or block numbering areas (BNAs) and block
groups (BGs) or, for areas that are not block numbered, enumeration
districts (EDs), places, and Congressional Districts.
Standard Extracts (Variable listing of the CSV files):
From the 3,300+ table cells available (containing only count data),
the following variables will be generated in the standard extract
files at several census geographies including county, tract,
blockgroup, minor civil division, place. These data will also be
aggregated to zipcodes (5-digit) and Metropolitan Statistical Area.
totpop total persons
landsqmi land area in sq miles
poppsqmi persons per square mile (land)
female female pop
rural persons in rural areas
onfarms persons on farms
infamily persons in families
alone persons living alone
groupqtr persons in group quarters
pctfemal pct female
pctgq pct persons in grp qtrs
white white pop
black black pop
asianpi asian & pac islandr pop
amindian am indian, esk, aleuts pop
hispanic persons of hispanic origin
pctwhite % white pop
pctblack % black pop
pctasian % asian + pi pop
pctamind % am indian, esk, aleuts
pcthisp % hispanic pop
age structure breakdown ... percentages
pct0_4 pct5_9 pct10_13 pct14_17 pct18_24
pct25_34 pct35_44 pct45_54 pct55_59 pct60_64
pct65_74 pct75_84 pct85_up
pct0_19 pct20_39 pct40_64 pct65_up
pct0_9 pct0_13 pct0_17 pct0_24 pct0_34
pct0_44 pct0_54 pct0_59 pct0_64 pct0_74
pct0_84
age structure breakdown ... counts
age0_4 age5_9 age10_13 age14_17 age18_24
age25_34 age35_44 age45_54 age55_59 age60_64
age65_74 age75_84 age85_up
age0_19 age20_39 age40_64 age65_up
age0_9 age0_13 age0_17 age0_24 age0_34
age0_44 age0_54 age0_59 age0_64 age0_74
medage median age
tothhs total households
avghhsz persons per household
hhs1 1-person hshlds age 65+
hhs2 2-person households
hhs3_4 3-4 person households
hhs5_up 5+ person households
pcthhs1 % 1-person households
pcthhs2 % 2-person households
pcthhs3_ % 3-4 person households
pcthhs5_ % 5+ person households
families total families
mcfams married couples
mcwchild :with related children
femhead female headed family, no husband present
femheadc :with related children
nonfhhs non-family households
pctmcfam % of families, married couples
pctmcwch % :with related children
pctfemhe % female headed fam, no husbnad present
pctfemhc % :with related chldren
pctnfhhs % non-family households
income breakdowns ... counts
hhi0_10 households with income < $10000 1989
hhi10_15 households with income $10k - $14,999
hhi15_25 households with income $15k - $24,999
hhi25_35 households with income $25k - $34,999
hhi35_50 households with income $35k - $49,999
hhi50_75 households with income $50k - $74,999
hhi75_99 households with income $75k - $99,999
hhi100up households with income $100,000 & up
income breakdowns ... percentages
phi0_10 % househlds with income < $10k '89
phi10_15 % househlds with income $10k - $14,999
phi15_25 % househlds with income $15k - $24,999
phi25_35 % househlds with income $25k - $34,999
phi35_50 % househlds with income $35k - $49,999
phi50_75 % househlds with income $50k - $74,999
phi75_99 % househlds with income $75k - $99,999
phi100up % househlds with income $100,000 & up
phi0_15 % househlds with income < $14,999
phi0_25 % househlds with income < $24,999
phi0_35 % househlds with income < $34,999
phi0_50 % househlds with income < $49,999
phi0_75 % househlds with income < $74,999
phi0_99 % househlds with income < $99,999
other ...
medhhinc median household income 1989
famwork0 families with no workers in 1989
famwork1 families with 1 worker in 1989
famwork2 families with 2 workers in 1989
famwork3 families with 3+ workers in 1989
avgfami0 average family income: fams w 0 wrkrs 1989
avgfami1 average family income: fams w 1 wrkr 1989
avgfami2 average family income: fams w 2 wrkrs 1989
avgfami3 average family income: fams w 3+ wrkrs 198
medfamin median family income 1989
avgfamin average family income 1989
pci per capita income
pcihhs per capita income, persons in hhs
poor persons below poverty level
verypoor persons below 50% of poverty level
pooruniv persons for whom poverty status determined
pctpoor % persons below poverty level
pctveryp % persons below 50% poverty level
elemeduc pop > 25 less than 9th grade ed
highsch1 pop > 25 9-12th grade no diploma
highsch2 pop > 25 high school graduate
college1 pop > 25 some college no degree
college2 pop > 25 associate degree
college3 pop > 25 bachelor's degree
college4 pop > 25 graduate or professional degree
pctelem % elementary education only
pcthsch1 % 9-12th grade no diploma
cthsch2 % high school graduates
pctcoll1 % some college, no degree
pctcoll2 % associate degree
pctcoll3 % bachelor's degree
pctcoll4 % graduate or prof. degree
pctnhsgr % not high school graduates
pctnocol % no college
pctnodeg % no college degree
pctnobac % no bachelor's degree
pctnogrp % no graduate/prof degree
clf civilian labor force 16+
unemplyd unemployed persons 16+
empovr16 employed persons 16+
unempfem unemployed female in civilian labor force
emplyfem employed females
pctunemp civilian labor force unemployment rate, 1989
clffem women in the civilian labor force 1989
nonclff women over 16 not in civilian labor force '89
ctunemf civilian labor force unemployment rate females 89
mgrprof managerial & pr0. specialty occs
techsadm technical, sales, admin support
servoccs service occupations
farmetc farm, forestry & fishing
otherocc other occupations
pctmgpr % managerial & pro specialty occs
pcttechs % technical, sales, admin support
pctserv % employed in service industries
pctfarme % employed in farm, foresty, fishing
pctothoc % employed in other occupations
totunits total housing units
occunits occupied housing units
vacant vacant housing units
ownerocc owner occupied housing units
rented renter occupied housing units
units1 single family units
units5up units in 5+ unit buildings
mobilhms mobile homes
condos condominium units
pctunit1 % single family units
pctunit5 % units in 5+ units buildings
pctvacnt % vacant units
pctowner % all units owner occ
pctrentr % all units renter occ
medyrblt median year built
builta85 units built 1985 - 3/90
built80_ units built 1980 - 3/90
built70_ units built 1970-1979
built60_ units built 1960-1969
built50_ units built 1950-1959
built40_ units built 1940-1949
builtp40 units built before 1940
pctbltmd % units built busiest decade
pctblt85 % units built 1985-3/90
pctblt40 % units built before 1940
avghval average value, owner units
medhval median value, owner units
untscrnt sepcified renter units with cash rent
medrent median gross rent