Measuring population and migration

Today in class we took some notes on population as well as immigration and the fertility rate. The crude birth rate is the number of births per 1,000 of the population. Crude death rate is the number of deaths per 1,000 of the population. Rate of natural increase is produced by subtracting the death rate from the birth rate. This gives us the annual natural growth rate in percentage form- for a country or region. Net migration rate is the difference between the number of persons entering and leaving a country during a year. Net immigration is the excess of persons entering the country. Net immigration is written as a positive number. Net emigration is the excess of persons leaving the country. Net emigration is written as a negative number.