On a local level, the State Data Center (SDC) plays a vital role in the dissemination of census data. In Iowa, the State Library functions as the SDC
lead agency and operates with a network of affiliates and coordinating agencies.
Iowa Workforce Development functions as a SDC affiliate.
What is the role of the SDC?
SDCs receive Census Bureau data for their particular state and make the data available to the public.
They often create customized products to meet the needs of their users.
Census data products are disseminated in printed reports, on CD-ROM
and DVD, on the State Data
Center's Web Site and on the
Census Bureau’s American
FactFinder. Population
estimates are prepared annually in between decennial censuses (see PDF
Map
for July of 2006 for Iowa).
The decennial census
data collected from
every household each ten years are known as
"100-percent" data. These data provide basic demographic and
housing characteristics for census blocks, census block groups,
census tracts, incorporated places, counties, states, the United
States, American Indian reservations, and metropolitan areas.
Census data
collected from a sample of the population during the continuous
American Community Survey (ACS) are known as "sample" data.
Nationwide implementation of the ACS started in 2005. The
sample data from the ACS provide more detailed demographic, social,
economic, and housing characteristics than the 100-percent data.
The size of the sample varies from one area to another, but overall,
it is about one household out of every eight for the United States.
ACS sample characteristics are
reported annually for areas with populations of 65,000 or more.
Three-year averages for
areas of 20,000 or more will be reported starting in 2008, and
five-year averages for smaller areas, including census tracts and
census block groups, will be reported starting in 2010.
The following table lists the subjects that were covered in each component of the 2000 Census.
|
CENSUS
2000 |
POPULATION |
HOUSING |
100-PERCENT
COMPONENT
(asked of all
persons and
housing units)
|
Age
Hispanic Origin
Household Relationship and type
Race
Gender
|
Occupancy
Tenure
- owned or rented
|
SAMPLE
COMPONENT
(asked of a sample
of population and
housing units)
|
Social
Characteristics:
Ancestry
Disability
Education (enrollment/attainment)
Fertility (# births in previous 12 mos.)*
Grandparents as caregivers
Language spoken at home
Marital status
Migration (residence one* year ago)
Place of birth, citizenship,
& year of entry to U.S.
Veteran status
Economic
Characteristics:
Class of worker
Commute to work
Employment status
Income (previous year) & benefits
(public assistance)
Industry
Occupation
Place of work |
Farm
residence
Heating fuel
Monthly rent
(incl. congregate housing)
Mortgage status
Number of bedrooms
Number of rooms
Plumbing and kitchen
facilities
Shelter costs, including
utilities
Telephone
Units in structure
Value of home
Vehicles available
Year moved into residence
Year structure built
|
