Population estimates and projections.

The Census Bureau revises population projections only as , usually every 2 or 3 years. Although the most recent of Census Bureau projections of the U.S. population nt Population Reports, Series P-25, No. 704) was ced over 3 years ago, revision is not yet necessary. s in fertility, mortality, and migration since the 1, 1976, base date of these projections have been similar the short-range changes projected in the middle series ies II). More importantly, no subsequent information a convincing case for changing the long-range ptions. Revised projections can thus await the results the 1980 census. In the meantime, this report provides guidance to the continued use of the 1977 national ons for both the short and long run. TOTAL POPULATION