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Scientific Data Documentation

Postcensal Population Estimates, Demo-Detail 1990-1995

DSN: CC36.CENSUS.POSTCEN.Y9095.DEMODETL                                   
 

DEMO-DETAIL:
 Estimates of Population Characteristics for Small Areas



METHODOLOGY FOR COUNTY ESTIMATES BY AGE: 1990-1995 (July 1)

 The age-sex-race estimates for counties are based on the 1990 census
 counts, as modified by the Census Bureau in its MARS file.  The estimates
 provide data for the White, Black, Indian, and Asian populations, by sex,
 for each single year of age from 0 to 85+.  The race modification carried
 out by the Census Bureau in the MARS file assigned those persons who did
 not indicate a specific race on their form (approximately 9.8 million) to
 White, Black, Indian, or Asian.  Most of these persons were of Hispanic
 origin, and were assigned chiefly to the White population.  The Bureau 
 also modified the age distributions, most notably for children under 5
 years of age.

 Procedures

 1. In order to obtain estimates of migration by race for each county
    for the period 1980-1990, the 1980 census figures were brought forward
    to 1990 with data on births, deaths, and a first estimate of migration
    (internal and international).  By controlling these estimates to actual
    1990 census totals, migration estimates by race for the decade consistent
    with both the 1980 and 1990 censuses were obtained.

 2. Projections of births and deaths by race for 1990-1995 were prepared.
    The estimates were controlled to agree with the Census Bureau's national
    projections, middle series, in Current Population Reports, Series P-25,
    No. 1092.

 3. Population projections by race to 1995 were prepared using the 1980-90
    migration rates.  The race data were then controlled to be consistent with
    the Bureau's 1995 estimates of the total population of each county, and
    with their 1995 national estimates by age, sex, and race released in 
    March 1996.

 4. The age and sex distribution in 1995 for each county was obtained
    using Demo-Detail's Alternative procedure as described in a professional
    paper "A Preliminary Comparison of Demo-Detail's County Estimates by 
    Age and Sex with the 1990 Census", presented at the annual meeting of 
    the Southern Demographic Association, October 1991, available on request.
    The 1995 estimates were adjusted in all detail to be consistent with 
    the Bureau's 1995 national estimates by age, sex and race mentioned in
    paragraph 3.

 5. The 1990 through 1994 age-sex-race estimates for each county were
    obtained by interpolation from the data for 1990 and 1995, controlled
    to agree with the Bureau's county estimates of total population and
    with their national estimates by age, sex and race.

 6. An important new feature is an adjustment for change in military
    and prison populations.  Administrative data for military bases were
    available through September 30, 1994, revealing major changes among
    the 183 counties where this group was significant.  The estimates
    were adjusted accordingly.  A similar adjustment was made for change
    in prison populations through 1993 for 349 counties, many with large
    new prisons.



COUNTY  ESTIMATES  BY  RACE,   SEX,  AND  SINGLE  YEAR  OF  AGE:
 1990-1995 (July 1)

 (American Indian,  (incl. Eskimo and Aleut),  can be obtained by subtraction.


TAPE RECORD FORMAT


 Character                  Item


   1-2			State FIPS code
   3-5			County FIPS code
   6			-blank-
   7-18			County Name
 *19-24			Total Male	Age 0		7/1/90
  25-30			Total Male	Age 1		7/1/90
  31-36			Total Male	Age 2		7/1/90
  37-42			Total Male	Age 3		7/1/90
  43-48			Total Male	Age 4		7/1/90
    -  			-        	-    		-
    -  			-         	-    		-
 529-534			Total Male	Age 85+		7/1/90 
 535-1050		Total Female	-repeat Age	" 
 1051-1566		White Male  	"       	" 
 1567-2082		White Female	"		" 
 2083-2598		Black Male  	"		" 
 2599-3114		Black Female	"		" 
 3115-3630		Asian Male  	"		" 
 3631-4146		Asian Female	"		" 
 4147-8274		-repeat race-sex-age		7/1/91 
 8275-12402		-repeat race-sex-age		7/1/92 
 12403-16530		-repeat race-sex-age		7/1/93 
 16531-20658		-repeat race-sex-age		7/1/94 
 20659-24786		-repeat race-sex-age		7/1/95


* From character 19,  all 4,128 data fields contain 6 characters.


EXAMPLE:
                                 U. S. TOTALS


 (JULY 1, 1990)
 AGE          M          F        WH. M     WH. F      BK. M      BK. F    AS. M 
 AS. F

   0      2039179    1946788    1624543    1542603    319908    313066    71199 
 68092    
   1      1942480    1853931    1543687    1466355    309472    302729    66574 
 62908           
   2      1899609    1811551    1515671    1438733    295646    288143    66103 
 63272
   3      1871688    1786336    1502188    1426268    284805    278603    63108 
 60674
   4      1892892    1804390    1522582    1443446    284772    278443    63751 
 61485
   5      1883623    1795032    1518319    1439212    280214    273253    63490 
 61598
   6      1822259    1738805    1470989    1396419    268130    261423    61985 
 60511
   7      1862708    1778391    1503063    1426597    274189    268804    63722 
 61911
   8      1793105    1711283    1446619    1373005    266240    260050    59999 
 58406 
   9      1884653    1792145    1515500    1432876    283296    276216    64019 
 61913

 (JULY 1, 1995)
 AGE
   0      1970031    1878339    1547576    1467445    314269    306522    86974 
 83458     
   1      1964572    1875859    1552602    1475168    306912    300439    84514 
 80261
   2      1989569    1892249    1574925    1492181    310365    300253    83459 
 79636 
   3      2026325    1938888    1606028    1530881    313356    305225    85782 
 82000
   4      2075180    1980813    1643450    1561656    324707    316463    85751 
 81863
   5      2069301    1970332    1641812    1556785    324623    315860    78797 
 74549
   6      1990732    1897328    1574779    1496017    317466    307402    74882 
 71085 
   7      1948813    1860434    1546844    1469823    304166    297387    74824 
 71168    
   8      1851087    1765019    1474709    1401183    284583    275929    70046 
 67020    
   9      1983288    1883422    1580467    1494782    303287    293264    75996 
 72828


           Grand Total
           7/1/95

          262,755,096





This page last reviewed: Friday, July 25, 2014
This information is provided as technical reference material. Please contact us at cwus@cdc.gov to request a simple text version of this document.
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