Birth Rate: The number of births per 1000 people in the population per year in a country.
Death Rate: The number of deaths per 1000 people in the population per year in a country.
Emigration: The migration of people out of a country.
Immigration: The migration of people into a country.
LEDC: Less Economically Developed Country.
MEDC: More Economically Developed Country.
Migration: The permanent or semi-permanent movement of people to live and work in another area or country.
Natural Increase: The relationship between the birth rate and the death rate of a country or area.
Population Growth: The difference between (BR + Immigration) and (DR+ Emigration).