The Natural Increase Rate (NIR) is the difference between the number of births and deaths in a population, expressed as a percentage. It does not include migration.
congrats on reading the definition of Natural Increase Rate (NIR). now let's actually learn it.
Crude Birth Rate (CBR): This is the total number of live births in a year for every 1,000 people alive in society.
Crude Death Rate (CDR): This is the total number of deaths in a year for every 1,000 people alive in society.
Population Growth Rate: This is the increase in a country’s population during a period of time, usually one year, expressed as a percentage of the population at the start of that period. It includes both natural changes to population (births and deaths) and net migration.