Another foundation stone in the study of human development was demography, the science that is concerned with the examination of both the structural factors (distributions by age, sex, marital status, etc.) and dynamic factors (births, deaths, migratory patterns, etc.) in human populations. The work of pioneer demographers such as John Graunt, Edmund Halley, Adolphe Quetelet, and Benjamin Gompertz led to the establishment of civil registries of births, deaths, marriages, and other demographic events in countries throughout the world. Such information was particularly important to the growth of life insurance companies during the nineteenth century. Most countries now have a bureau of demography or a health statistics center for maintaining records of vital statistics on the country's population. In the United States, the National Center for Health Statistics of the U.S. Department of Health and Human Services collects nationwide data concerning births, marriages, divorces, and deaths by age, sex, race/ethnicity, geographical region, and month, and makes this information available in publications such as the Monthly Vital Statistics Report. Statistical information on various countries throughout the world is available from the United Nations and certain other organizations. Particularly noteworthy is the Population Reference Bureau, which annually publishes a World Population Data Sheet including statistics by country, continent, and regions within continents on population (overall and by age), projected population, births, deaths, infant mortality rate, fertility rate, life expectancy, contraceptive usage by women, secondary-school enrollment, per capital gross national product (GNP), and certain other derived statistics.

Anti Aging Made Easy

Anti Aging Made Easy

When it comes to reducing wrinkles, you really have to take your needs seriously. There are a number of factors that play a role in the health and well being of your skin. It is often hard to understand how products work and why they may not work even if they promise to do so. If you are considering wrinkle creams and a regimen of facelifts, you may go broke in the process. Before you do all of that, consider going through a process of determine the very best solution for your needs.

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