Agenda - Council - 02/10/1981 - Laserfiche WebLink

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deaths were compiled from State vital statistics offices supplemented by data from the National Center for Health Statistics. County statistics were avail- able for all States. When vital statistics were not available for all areas within a county, the births and deaths for these areas were estimated and adjusted to agree with county-level figures. 2. Net Migration: This component of population change was estimated for each unit of government by devel- oping net migration rates from Federal income tax return data. Returns were matched from one filing date to an- other in order to determine mover/ nonmover status. For the July 1, 1978 population estimates these rates were derived from 1976 and 1977 returns which were filed in April 1977 and 1978, respectively. The number of those who moved in, minus the num- ber who moved out, yields the net mi- gration. The rate computed from these data was applied to the total nongroup quarters population in an area, which was the population that was not re- siding in an institution, college, or mil- itary barracks. These latter special population groups were accounted for separately, as were immigrants from abroad. For all areas where special censuses have been conducted by the Bureau of the Cen- sus close to the 1978 estimate date, and in selected areas where special, censuses are conducted locally, the special census counts were used in the preparation of the estimates. In these cases the special census 2 counts were adjusted to the July 1, 1978 estimate date. In addition, the subcounty estimates in six States prepared by the Bureau of the Census were averaged with estimates produced by State agencies par- ticipating in the Federal-State Coopera- tire Program for Local Population Estimates. These States are: California, Florida, New Jersey, Ore§on, Washington and Wisconsin. The July 1, 1978 population estimates for counties represent the average change be- tween July 1, 1977 and July 1, 1978 adminis- trative record-based estimates derived by the procedures described above, and Com- ponent Method II estimates derived from the Federal-State Cooperative Program. This average change was added to the July 1, 1977 county estimates to yield July 1, 1978 county estimates. The county popula- tions were further adjusted to be consistent with State estimates published by the Bu- reau of the Census in Current Population Reports, Series P-25, just ~ the population estimates for the governments in each county were adjusted to be consistent with the county population figures. The July 1, 1978 population estimates re- late to boundaries as of December 31, 1978. Adjustments to the 1970 population base were made for new incorporations, disin- corporations, and qualifying annexations. Population of Indian Tribes and Alaskan Native Villages The population of an Indian tribe or Alas- kan native village for the initial allocations for £ntitlement Period 12 is the resident population as of July 1, 1978 as determined by the Bureau of Indian Affairs. The April 1,