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US DEPARTMENT OF COMMERCE Social and Economic Statistics Administration BUREAU OF THE CENSUS

Series P-26, No. 61

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ESTIMATES OF THE POPULATION OF SOUTH DAKOTA
COUNTIES AND METROPOLITAN AREAS:
JULY 1, 1972 AND 1973

This report presents population estimates for July 1, 1972 and provisional estimates for July 1, 1973, for counties and metropolitan areas prepared under the auspices of the Federal-State Cooperative Program for Local Population Estimates. The objective of this program is the development and publication of State-prepared estimates of the population of counties using uniform procedures largely standardized for data input and methodology. The methods used have been mutually agreed upon by the individual States and the Bureau of the Census on the basis of a test of methods against the 1970 census. For a more detailed description of the program and an analysis of the test results, see Current Population Reports, Series P-26, No. 21, "FederalState Cooperative Program for Local Population Estimates: Test Results--April 1, 1970," April 1973.

County estimates for July 1, 1971 were published earlier in Current Population Reports, Series P-26, No. 12.

The estimates shown here for the 67 counties in the State were prepared by the Division of Public Health Statistics of the South Dakota State Department of Health. This agency was designated by the Governor to work with the Bureau of the Census in implementing and carrying out the Federal-State Cooperative Program.

The estimates shown for July 1, 1972 are based on an average of the following methods, adjusted to agree with the July 1, 1972 State estimates published in Series P-25, No. 508.

March 1974

1. The Regression (ratio-correlation) method. In the Regression method a multiple regression equation is used to relate changes in a number of different data series to change in population distribution. 1 The series of data used in the Regression method for South Dakota are: twoyear average of resident births (X1), two-year average of resident deaths (X2), automobile registrations (X3), school census (X4), and retail sales (X5). The prediction equation for South Dakota for the 1970's is given by

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For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402, 25 cents. Current Population Reports issued in Series P-20, P-23, P-25, P-26, P-27, P-28 (summaries only), P-60, and P-65 are sold as a single consolidated subscription at $30.50 per year, $7.75 additional for foreign mailing.

The provisional July 1, 1973 estimates for large metropolitan counties were developed by adding the average change between 1972 and 1973 estimates based on Component Method II and the Housing Unit method to the 1972 estimates. In the Housing Unit Method the estimates of population are based on estimates of the housing inventory. Changes in the housing inventory are derived from data on building permits issued and demolition records, or on data on electric meter connections. The provisional July 1, 1973 estimates for the remaining counties were developed by adding the change between 1972 and 1973 Component Method II estimates to the 1972 estimates. All counties were subsequently adjusted to agree with the provisional July 1, 1973 State estimate published in Current Population Reports, Series P-25, No. 508.

Table 2 of this report presents estimates of the population of metropolitan areas and metroThe titles and politan counties in the State. definitions of the standard metropolitan statistical areas (SMSA's) are those currently defined by the Office of Management and Budget, Executive Office of the President. Where an SMSA falls

in more than one State (indicated in the SMSA title) information on the other State parts of the area can be obtained by referring to the P-26 report for the other States.

Corresponding estimates for other States in the program will be published as they become available. The appendix table shows reports published to date for States in the 1972-73 series, together with those published earlier for 1971 and provisional 1972.

The 1970 Census total for the State shown on the table may differ slightly from the sum of the counties because of corrections made subsequent to the release of the official State figure. All county populations for 1970 reflect corrections in the census count published in the bound 1970 census volume for the State.

The estimates presented in the table have been rounded to the nearest hundred without being adjusted to the State total, which was independently rounded to the nearest thousand. Percentages

are based on unrounded numbers.

Table 1. ESTIMATES OF THE POPULATION OF SOUTH DAKOTA COUNTIES:
JULY 1, 1972 AND JULY 1, 1973

(State estimates are shown to the nearest thousand, county estimates to the nearest hundred)

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Table 1. ESTIMATES OF THE POPULATION OF SOUTH DAKOTA COUNTIES:
JULY 1, 1972 AND JULY 1, 1973-Continued

(State estimates are shown to the nearest thousand, county estimates to the nearest hundred)

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Z Less than 50 or less than 0.05 percent. 1Total does not agree with the sum of the counties due to corrections made to the county populations after release of the official State counts.

2 Births and deaths are based on reported vital statistics from April 1, 1970, to December 31, 1972, with extrapolations to June 30, 1973. Net migration is the difference between net change and natural increase.

Table 2. ESTIMATES OF THE POPULATION OF METROPOLITAN AREAS AND THEIR COMPONENT COUNTIES: SOUTH DAKOTA, JULY 1, 1972 AND 1973

(SMSA totals rounded independently of county numbers)

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'Births and deaths are based on reported vital statistics from April 1, 1970, to December 31, 1972, extrapolations to June 30, 1973. Net migration is the difference between net change and natural increase.

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