Census characteristics |
|
1970 |
1980 |
1990 |
2000 |
2005 |
|
2010 |
Title |
1970 Census of Population and Housing |
1980 Census of Population and Housing |
1990 Census of Population and Housing |
2000 Census of Population and Housing |
2005 American Community Survey |
|
2010 American Community Survey |
Census agency |
U.S. Census Bureau |
U.S. Census Bureau |
U.S. Census Bureau |
U.S. Census Bureau |
U.S. Census Bureau |
|
U.S. Census Bureau |
Population universe |
Residents of Puerto Rico. |
Residents of Puerto Rico. |
Residents of Puerto Rico. |
Residents of Puerto Rico. |
Residents of Puerto Rico. |
|
Residents of Puerto Rico. |
De jure or de facto |
De jure |
De jure |
De jure |
De jure |
De jure |
|
De jure |
Enumeration unit |
Households and Group Quarters |
Households and Group Quarters |
Households and Group Quarters |
Households and Group Quarters |
Households |
|
Households |
Census day |
April 1, 1970 |
April 1, 1980 |
April 1, 1990 |
April 1, 2000 |
July 1, 2005 |
|
January 1st, 2010 to December 31, 2010 |
Enumeration forms |
One in five housing units in 1970 received a long form containing supplemental sample questions. Three independent 1 percent public use samples were produced for 1970, each privileging a particular geography: neighborhood, municipio, and "state". IPUMS-International uses the municipio sample. |
The 1980 census employed a single long form questionnaire completed by one-half of housing units in places with a population under 2,500 and one-sixth of other housing units. |
The 1990 census used a single long-form questionnaire completed by one-half of persons in places with a population under 2,500, one-sixth of persons in other tracts and block numbering areas with fewer than 2,000 housing units, and one-eighth of all other areas. Overall, about one-sixth of housing units completed a long form. |
The 2000 census used a long form questionnaire. Long Form Sampling Entities (LFSEs) were used to determine sampling rates. If the smallest LFSE that included all or any part of a block had an estimated housing unit count of less than 800, the housing units in the block were sampled at a 1-in-2 rate. If it had an estimated housing unit count of 800 or more but less than 1,200, units were sampled at a 1-in-4 rate. If a block was not in either of the two previous categories, and was part of an interim census tract with 2,000 or more estimated housing units, units were sampled at a 1-in-8 rate. Housing units in all remaining blocks were sampled at a 1-in-6 rate. When all sampling rates were taken into account across the nation, approximately 1 out of every 6 housing units was included in the Census 2000 sample. |
The 2005 American Community Survey employed a single long form questionnaire completed by one in 100 of households. |
|
The 2010 American Community Survey employed a single long form questionnaire completed by one in 100 of households. |
Type of fieldwork |
Direct and self-enumeration |
Direct and self-enumeration |
Direct and self-enumeration |
Direct and self-enumeration |
Direct and self-enumeration |
|
Direct and self-enumeration |
Respondent |
Not specified |
Not specified |
Not specified |
Not specified |
Not specified |
|
Not specified |
Undercount |
No official estimates |
No official estimates |
No official estimates |
No official estimates |
No official estimates |
|
No official estimates |
Units identified |
|
1970 |
1980 |
1990 |
2000 |
2005 |
|
2010 |
Dwellings |
No |
No |
No |
No |
No |
|
No |
Vacant units |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Yes |
Smallest geography |
Metropolitan areas and county groups with 250,000+ population |
PUMAS (Public Use Microdata Areas (PUMAs) containing 100,000 or more residents |
PUMAS (Public Use Microdata Areas (PUMAs) containing 100,000 or more residents |
PUMAS (Public Use Microdata Areas (PUMAs) containing 100,000 or more residents |
PUMAS (Public Use Microdata Areas (PUMAs) containing 100,000 or more residents |
|
PUMAS (Public Use Microdata Areas (PUMAs) containing 100,000 or more residents |
Unit definitions |
|
1970 |
1980 |
1990 |
2000 |
2005 |
|
2010 |
Households |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Yes |
Individuals |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Yes |
Group quarters |
Yes |
Yes |
Yes |
Yes |
No |
|
Yes |
Households |
Dwelling places with fewer than five persons unrelated to a household head, excluding institutions and transient quarters. |
Dwelling places with fewer than ten persons unrelated to a household head, excluding institutions and transient quarters. |
Dwelling places with fewer than ten persons unrelated to a household head, excluding institutions and transient quarters. |
Dwelling places excluding institutions and transient quarters. |
Dwelling places excluding institutions and transient quarters. |
|
Dwelling places excluding institutions and transient quarters. |
Group quarters |
Institutions, transient quarters, and dwelling places with five or more persons unrelated to a household head. |
Institutions, transient quarters, and dwelling places with ten or more persons unrelated to a household head. |
Institutions, transient quarters, and dwelling places with ten or more persons unrelated to a household head. |
No threshold was applied; in order for a household to be considered group quarters in 2000, it had to be on the list of group quarters that is continuously maintained by the Census Bureau. |
Not included in microdata sample. |
|
A place where people live or stay, in a group living arrangement, that is owned or managed by an entitiy or organization providing housing and/or services for the residents. This is not a typical household-type living arrangement. These services many include custodial or medical care as well as other types of assistance, and residency is commonly restricted to those receiving these services. People living in group quarters are usually not related to each other. |