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1. Implementation of a new March CPS processing system.
2. Implementation of 1970 census population controls.
3. Implementation of a new March CPS processing system. Questionnaire expanded to ask eleven income questions.
4. Implementation of 1980 census population controls. Questionnaire expanded to show 27 possible values from 51 possible sources of income.
5. Implemented three technical changes to the poverty definition. See Characteristics of the Population Below the Poverty Level: 1980; Series P-60, No. 133.
6. Implementation of Hispanic population weighting controls.
7. Implementation of a new March CPS processing system.
8. CPS file for March 1992 (1991 data) was corrected after the release of the 1991 Income and Poverty reports. Weights for nine person records were omitted on the original file. (See P60-184 for further details.)
9. Implementation of 1990 census population controls.
10. Data collection method changed from paper and pencil to computer- assisted interviewing. In addition, the March 1994 income supplement was revised to allow for the coding of different income amounts on selected questionnaire items. Limits either increased or decreased in the following categories: earnings increased to $999,999; Social Security increased to $49,999; Supplemental Security Income and Public Assistance increased to $24,999; Veterans' Benefits increased to $99,999; Child Support and Alimony decreased to $49,999.
11. Implementation of Census 2000 based population controls.
12. Implementation of Census 2000 based population controls and sample expanded by by 28,000 households.
13. Beginning in 2003, CPS ASEC offered respondents the option of choosing more than one race. The 2002 and 2001 CPS ASEC recorded only one race for each respondent. The 3-year averages for 2002 are based on combining the 2003 CPS ASEC race categories shown in the stub with the relevant single race categories of White, Black, American Indian or Alaska Native, or Asian and Pacific Islander recorded in the 2002 and 2001 CPS ASEC.
14. The 2004 data have been revised to reflect a correction to the weights in the 2005 ASEC.
15. The "Outside metropolitan statistical areas" category includes both micropolitan statistical areas and territory outside of metropolitan and micropolitan statistical areas. For more information, see "About Metropolitan and Micropolitan Statistical Areas" at www.census.gov/population/www/estimates/aboutmetro.html
16. Work experience: Refers to the longest job held in the previous calendar year. The work experience categories are based on the number of weeks worked, and the number of hours worked per week. Full-time year-round: Worked at least 35 hours per week, for at least 50 weeks last year (including paid sick leave and vacations). Not full-time year-round: Worked for at least 1 week last year, but for less than 50 weeks, or less than 35 hours per week, or both.
A. People of Hispanic origin may be of any race. Data for Hispanic origin not available prior to 1972.
B. Beginning in January 1978, the Bureau of Labor Statistics introduced a new price index for all urban consumers (CPI-U) that forms a continuous series with the earlier index for urban wage earners and for clerical workers as of December 1997.
C. Prior to 1979 unrelated subfamilies were included in all families. Beginning in 1979 unrelated subfamilies are excluded from all families.
Note: The 2003 Current Population Survey asked respondents to choose one or more races. White alone refers to people who reported White and did not report any other race category. The use of this single-race population does not imply that it is the preferred methods of presenting or analyzing data. The Census Bureau use variety of approaches. Information on people who reported more than one race, such as "White and American Indian and Alaska Native" or "Asian and Black or African American," is available from Census 2000 through American FactFinder. About 2.6 percent of people reported more than one race in 2000. Black alone refers to people who reported Black and did not report any other race category. Asian alone refers to people who reported Asian and did not report any other race category. Asian and/or Native Hawaiian and Other Pacific Islander refers to people who reported either or both of these categories, but did not report any other category.