Population: This entry gives an estimate from the US Bureau of the Census based on statistics from population censuses, vital statistics registration systems, or sample surveys pertaining to the recent past, and on assumptions about future trends. Starting with the 1993 Factbook, demographic estimates for some countries (mostly African) have taken into account the effects of the growing incidence of AIDS infections; in 1997 these countries were Botswana, Brazil, Burkina Faso, Burundi, Cameroon, Central African Republic, Republic of the Congo, Cote d'Ivoire, Ethiopia, Guyana, Haiti, Kenya, Lesotho, Malawi, Nigeria, Rwanda, South Africa, Tanzania, Thailand, Uganda, Zaire which is now known as Democratic Republic of the Congo, Zambia, and Zimbabwe. The total population presents one overall measure of the potential impact of the country on the world and within its region.
Population growth rate: The average annual percent change in the population, resulting from a surplus (or deficit) of births over deaths and the balance of migrants entering and leaving a country. The rate may be positive or negative. Also known as growth rate or average annual rate of growth. The growth rate is a factor in determining how rapidly a country responds to the changing needs of its people in terms of infrastructure (e.g., schools, hospitals, housing, roads), resources (e.g., food, water, electricity), and jobs. Rapid population growth can also be seen as threatening by neighboring countries.
Ports and harbors: This entry lists a few ports and harbors selected on the basis of overall importance to each country. This is determined by evaluating a number of factors (e.g., dollar value of goods handled, gross tonnage, facilities, military significance).
Radio broadcast stations: This entry includes the total number of AM,
FM, and shortwave broadcast stations.
Radios: This entry gives the total number of radio receivers.
Railways: This entry includes the total length of the railway network and component parts by gauge: broad, dual, narrow, standard, and other.
Reference maps: This section includes world, regional, and special or current interest maps.
Religions: This entry includes a rank ordering of religions starting with the largest and sometimes includes the percent of total population.
Sex ratio: This entry includes the number of males for each female in five age groups-at birth, under 15 years, 15-64 years, 65 years and over, and for the total population. Sex ratio at birth has recently emerged as an indicator of certain kinds of sex discrimination in some countries. For instance, high sex ratios at birth in some Asian countries are now attributed to sex-selective abortion and infanticide due to a strong preference for sons. This will affect future marriage patterns and fertility patterns and could cause unrest among young adult males who are unable to find partners. The sex ratio at birth for the World is 1.06 (1997 est.).
Suffrage: This entry gives the age at enfranchisement and whether the right to vote is universal or restricted.