the figure for the difference between the number of persons entering and leaving a country during the year per 1,000 persons (based on midyear population). An excess of persons entering the country is referred to as net immigration (e.g., 3.56 migrants/1,000 population); an excess of persons leaving the country as net emigration (e.g., -9.26 migrants/1,000 population). The net migration rate indicates the contribution of migration to the overall level of population change. High levels of migration can cause problems such as increasing unemployment and potential ethnic strife (if people are coming in) or a reduction in the labor force, perhaps in certain key sectors (if people are leaving).

People: This category includes the entries dealing with the characteristics of the people and their society.

People—note: This entry includes miscellaneous demographic information of significance not included elsewhere.

Personal Names—Capitalization: The Factbook capitalizes the surname or family name of individuals for the convenience of our users who are faced with a world of different cultures and naming conventions. An example would be President SADDAM Husayn of Iraq. Saddam is his name and Husayn is his father's name. He may be referred to as President SADDAM Husayn or President SADDAM, but not President Husayn. The need for capitalization, bold type, underlining, italics, or some other indicator of the individual's surname is apparent in the following examples: MAO Zedong, Fidel CASTRO Ruz, William Jefferson CLINTON, and TUNKU SALAHUDDIN Abdul Aziz Shah ibni Al-Marhum Sultan Hisammuddin Alam Shah. By knowing the surname, a short form without all capital letters can be used with confidence as in President Saddam, President Castro, Chairman Mao, President Clinton, or Sultan Tunku Salahuddin. The same system of capitalization is extended to the names of leaders with surnames that are not commonly used such as Queen ELIZABETH II.

Personal Names—Spelling: The romanization of personal names in the Factbook normally follows the same transliteration system used by the US Board on Geographic Names for spelling place names. At times, however, a foreign leader expressly indicates a preference for, or the media or official documents regularly use, a romanized spelling that differs from the transliteration derived from the US Government standard. In such cases, the Factbook uses the alternative spelling.

Personal Names—Titles: The Factbook capitalizes any valid title (or short form of it) immediately preceding a person's name. A title standing alone is lowercased. Examples: President YEL'TSIN and President CLINTON are chiefs of state. In Russia, the president is chief of state and the premier is the head of the government, while in the US, the president is both chief of state and head of government.

Pipelines: This entry gives the lengths and types of pipelines for transporting products like natural gas, crude oil, or petroleum products.

Political parties and leaders: This entry includes a listing of significant political organizations and their leaders.

Political pressure groups and leaders: This entry includes a listing of organizations with leaders involved in politics, but not standing for legislative election.

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. The total population presents one overall measure of the potential impact of the country on the world and within its region. Note: 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. These countries are Botswana, Brazil, Burkina Faso, Burma, Burundi, Cambodia, Cameroon, Central African Republic, Democratic Republic of the Congo, Republic of the Congo, Cote d'Ivoire, Ethiopia, Guyana, Haiti, Honduras, Kenya, Lesotho, Malawi, Namibia, Nigeria, Rwanda, South Africa, Swaziland, Tanzania, Thailand, Uganda, Zambia, and Zimbabwe.

Population below poverty line: National estimates of the percentage of the population lying below the poverty line are based on surveys of sub-groups, with the results weighted by the number of people in each group. Definitions of poverty vary considerably among nations. For example, rich nations generally employ more generous standards of poverty than poor nations.

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. The growth rate is a factor in determining how great a burden would be imposed on a country by the changing needs of its people for infrastructure (e.g., schools, hospitals, housing, roads), resources (e.g., food, water, electricity), and jobs. Rapid population growth can be seen as threatening by neighboring countries.

Ports and harbors: This entry lists the major 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. Eventually it could cause unrest among young adult males who are unable to find partners. The sex ratio at birth for the World is 1.06 (1999 est.).

Suffrage: This entry gives the age at enfranchisement and whether the right to vote is universal or restricted.

Telephone numbers: All telephone numbers in the Factbook consist of the country code in brackets, the city or area code (where required) in parentheses, and the local number. The one component that is not presented is the international access code, which varies from country to country. For example, an international direct dial telephone call placed from the US to Madrid, Spain, would be as follows:

011 [34] (1) 577-xxxx where

011 is the international access code for station-to-station calls

(01 is for calls other than station-to-station calls),

[34] is the country code for Spain,

(1) is the city code for Madrid,

577 is the local exchange, and

xxxx is the local telephone number.

An international direct dial telephone call placed from another country to the US would be as follows:

international access code + [1] (202) 939-xxxx, where

[1] is the country code for the US,