Annual Summary of Vital Statistics—1977
Keyword(s):
Data for this article, as in previous reports1, are drawn principally from the Monthly Vital Statistics Report2,6, published by the National Center for Health Statistics. The international data come from the Demographic Yearbook7 and the quarterly Population and Vital Statistics Report8, both published by the Statistical Office of the United Nations. All the U.S. data for 1977 are estimates by place of occurrence based on a 10% sample of material received in state offices between two dates, one month apart, regardless of when the event occurred. Experience has shown that for the country as a whole the estimate is very close to the subsequent final figures.