Codes and Frequencies
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Explore how IPUMS created this variable
Most IPUMS data transformations are performed using variable harmonization tables that specify how each value in the source data is recoded. Some variables also require programming logic in addition to the harmonization table. The harmonization documents for this variable are:
- Complex/technical variable: contact ipums@umn.edu for details.
Description
NFAMS is a constructed variable that indicates the number of families within each household. Family membership is defined by FAMUNIT. A "family" is any group of persons related by blood, adoption, or marriage. An unrelated individual within the household is considered a separate family. Thus, a household consisting of a widow and a domestic employee contains two families; a household consisting of a large, multi-generation extended family with no persons unrelated to the head counts as a single family.
NFAMS is constructed from information in RELATE (relationship to head) and from the constructed pointer variables SPLOC, MOMLOC, and POPLOC (location of spouse, mother, and father). See those variable descriptions for more detail.
Comparability — General
The variable is comparable across samples, although there is variation in the specific information and methods used to make the pointer links.
No household constructed variables are available for the individual-level samples that do not contain entire households of persons.
Family interrelationship variables were constructed using different algorithms in historical samples than those used for modern samples. In pre-1950 samples, surnames are often available and help determine relationships. The historical samples also rely more on record order when there is uncertainty determining the relationship.
Universe
- All households
Availability
- Argentina: 1970, 1980, 1991, 2001
- Armenia: 2001, 2011
- Austria: 1971, 1981, 1991, 2001
- Bangladesh: 1991, 2001, 2011
- Belarus: 1999, 2009
- Benin: 1979, 1992, 2002, 2013
- Bolivia: 1976, 1992, 2001, 2012
- Botswana: 1981, 1991, 2001, 2011
- Brazil: 1960, 1970, 1980, 1991, 2000, 2010
- Burkina Faso: 1996, 2006
- Cambodia: 1998, 2004, 2008, 2013, 2019
- Cameroon: 1976, 1987, 2005
- Canada: 1891, 1901, 1911, 2011
- Chile: 1970, 1982, 1992, 2002
- China: 1982, 1990, 2000
- Colombia: 1973, 1985, 1993, 2005
- Costa Rica: 1973, 1984, 2000, 2011
- Cuba: 2002, 2012
- Côte d'Ivoire: 1988, 1998
- Denmark: 1787, 1801, 1845, 1880, 1885
- Dominican Republic: 1981, 2002, 2010
- Ecuador: 1974, 1982, 1990, 2001, 2010
- Egypt: 1986, 1996, 2006
- El Salvador: 1992, 2007
- Ethiopia: 1984, 1994, 2007
- Fiji: 1976, 1986, 1996, 2007, 2014
- France: 1962, 1968, 1975, 1982, 1990, 1999, 2006, 2011
- Germany: 1971, 1981, 1987
- Ghana: 2000, 2010
- Greece: 1971, 1981, 1991, 2001, 2011
- Guatemala: 1964, 1973, 1981, 1994, 2002
- Guinea: 1983, 1996, 2014
- Haiti: 1971, 1982, 2003
- Honduras: 1974, 1988, 2001, 2013
- Hungary: 1970, 1980, 1990, 2001, 2011
- Iceland: 1703, 1729, 1801, 1901, 1910
- India: 1983, 1987, 1993, 1999, 2004, 2009
- Indonesia: 1971, 1976, 1980, 1985, 1990, 1995, 2000, 2005, 2010
- Iran: 2006, 2011
- Iraq: 1997
- Ireland: 1901, 1911, 1971, 1979, 1981, 1986, 1991, 1996, 2002, 2006, 2011, 2016
- Israel: 1972, 1983, 1995
- Italy: 2001, 2011, 2011Q1, 2012Q1, 2013Q1, 2014Q1, 2015Q1, 2016Q1, 2017Q1, 2018Q1, 2019Q1, 2020Q1
- Jamaica: 1982, 1991, 2001
- Jordan: 2004
- Kenya: 1969, 1989, 1999, 2009, 2019
- Kyrgyzstan: 1999, 2009
- Laos: 1995, 2005, 2015
- Lesotho: 1996, 2006
- Liberia: 2008
- Malawi: 1987, 1998, 2008, 2018
- Malaysia: 1970, 1980, 1991, 2000
- Mali: 1987, 1998, 2009
- Mauritius: 1990, 2000, 2011
- Mexico: 1970, 1990, 1995, 2000, 2005Q1, 2005Q2, 2005Q3, 2005Q4, 2006Q1, 2006Q2, 2006Q3, 2006Q4, 2007Q1, 2007Q2, 2007Q3, 2007Q4, 2008Q1, 2008Q2, 2008Q3, 2008Q4, 2009Q1, 2009Q2, 2009Q3, 2009Q4, 2010, 2010Q1, 2010Q2, 2010Q3, 2010Q4, 2011Q1, 2011Q2, 2011Q3, 2011Q4, 2012Q1, 2012Q2, 2012Q3, 2012Q4, 2013Q1, 2013Q2, 2013Q3, 2013Q4, 2014Q1, 2014Q2, 2014Q3, 2014Q4, 2015, 2015Q1, 2015Q2, 2015Q3, 2015Q4, 2016Q1, 2016Q2, 2016Q3, 2016Q4, 2017Q1, 2017Q2, 2017Q3, 2017Q4, 2018Q1, 2018Q2, 2018Q3, 2018Q4, 2019Q1, 2019Q2, 2019Q3, 2019Q4, 2020, 2020Q1, 2020Q3
- Mongolia: 1989, 2000, 2010, 2020
- Morocco: 1982, 1994, 2004, 2014
- Mozambique: 1997, 2007, 2017
- Myanmar: 2014
- Nepal: 2001, 2011
- Nicaragua: 1971, 1995, 2005
- Nigeria: 2006, 2007, 2008, 2009, 2010
- Norway: 1801, 1865, 1875, 1900, 1910
- Pakistan: 1973, 1998
- Palestine: 1997, 2007, 2017
- Panama: 1960, 1970, 1980, 1990, 2000, 2010
- Papua New Guinea: 1980, 1990, 2000
- Paraguay: 1962, 1972, 1982, 1992, 2002
- Peru: 1993, 2007, 2017
- Philippines: 1990, 1995, 1997Q1, 1997Q2, 1997Q3, 1997Q4, 1998Q1, 1998Q2, 1998Q3, 1998Q4, 1999Q1, 1999Q2, 1999Q3, 1999Q4, 2000, 2000Q1, 2000Q2, 2000Q3, 2000Q4, 2001Q1, 2001Q2, 2001Q3, 2001Q4, 2002Q1, 2002Q2, 2002Q3, 2002Q4, 2003Q1, 2003Q2, 2003Q3, 2003Q4, 2004Q1, 2004Q2, 2004Q3, 2004Q4, 2005Q1, 2005Q2, 2005Q3, 2005Q4, 2006Q1, 2006Q2, 2006Q3, 2006Q4, 2007Q1, 2007Q2, 2007Q3, 2007Q4, 2008Q1, 2008Q2, 2008Q3, 2008Q4, 2009Q1, 2009Q2, 2009Q3, 2009Q4, 2010, 2010Q1, 2010Q2, 2010Q3, 2010Q4, 2011Q1, 2011Q2, 2011Q3, 2011Q4, 2012Q1, 2012Q2, 2012Q3, 2012Q4, 2013Q1, 2013Q2, 2013Q3, 2013Q4, 2014Q1, 2014Q2, 2014Q3, 2014Q4, 2015Q1, 2015Q2, 2015Q3, 2015Q4, 2016Q1, 2016Q2, 2016Q3, 2016Q4, 2017Q1, 2017Q2, 2017Q3, 2017Q4, 2018Q1, 2018Q2, 2018Q3, 2018Q4, 2019Q1, 2019Q2, 2019Q3
- Poland: 1978, 2002
- Portugal: 1981, 1991, 2001, 2011
- Puerto Rico: 1970, 1980, 1990, 2000, 2005, 2010, 2015, 2020
- Romania: 1977, 1992, 2002, 2011
- Russia: 2002, 2010
- Rwanda: 1991, 2002, 2012
- Saint Lucia: 1980, 1991
- Senegal: 1988, 2002, 2013
- Sierra Leone: 2004, 2015
- Slovenia: 2002
- South Africa: 1996, 2001, 2007, 2011, 2016
- South Sudan: 2008
- Spain: 1991, 2001, 2005Q1, 2005Q2, 2005Q3, 2005Q4, 2006Q1, 2006Q2, 2006Q3, 2006Q4, 2007Q1, 2007Q2, 2007Q3, 2007Q4, 2008Q1, 2008Q2, 2008Q3, 2008Q4, 2009Q1, 2009Q2, 2009Q3, 2009Q4, 2010Q1, 2010Q2, 2010Q3, 2010Q4, 2011Q1, 2011Q2, 2011Q3, 2011Q4, 2012Q1, 2012Q2, 2012Q3, 2012Q4, 2013Q1, 2013Q2, 2013Q3, 2013Q4, 2014Q1, 2014Q2, 2014Q3, 2014Q4, 2015Q1, 2015Q2, 2015Q3, 2015Q4, 2016Q1, 2016Q2, 2016Q3, 2016Q4, 2017Q1, 2017Q2, 2017Q3, 2017Q4, 2018Q1, 2018Q2, 2018Q3, 2018Q4, 2019Q1, 2019Q2, 2019Q3, 2019Q4, 2020Q1, 2020Q2, 2020Q3, 2020Q4
- Sudan: 2008
- Suriname: 2012
- Sweden: 1880, 1890, 1900, 1910
- Switzerland: 1970, 1980, 1990, 2000
- Tanzania: 1988, 2002, 2012
- Thailand: 1970, 1980, 1990, 2000
- Togo: 1960, 1970, 2010
- Trinidad and Tobago: 1970, 1980, 2000, 2011
- Turkey: 1985, 1990, 2000
- Uganda: 1991, 2002, 2014
- United Kingdom: 1851a, 1851b, 1851c, 1861a, 1861b, 1871b, 1881a, 1881b, 1891a, 1891b, 1901a, 1901b, 1911, 1991
- United States: 1850a, 1850b, 1860, 1870, 1880a, 1880b, 1900, 1910, 1960, 1970, 1980, 1990, 2000, 2005, 2010, 2015, 2020
- Uruguay: 1963, 1975, 1985, 1996, 2006, 2011
- Venezuela: 1971, 1981, 1990, 2001
- Vietnam: 1989, 1999, 2009, 2019
- Zambia: 1990, 2000, 2010
- Zimbabwe: 2012
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