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Adult Literacy Percentage
It indicates what percentage of adult population is literate. This forms the basis of programmes such as adult education programmes, family welfare programmes, health awareness programmes., etc. General success of many national developmental programmes depends upon adult literacy %.Immigration
Immigration refers to entry of population from other countries for permanent residence. They add to the population of nation. It excludes tourists and visitors.Emigration
Emigration refers to section of people leaving the country to reside in other countries permanently. Emigration reduces the population.Population Growth Rate
Population growth rate refers to net rate at which population is added annually to the population.Population growth rate = (Br + Ir ) - (Dr + Er )
where Br - Birth rateIr - Immigration rate
Dr - Death rateEr - Emigration rate
all expressed as % of population.Age-sex pyramids between 1975 and 2000: (a) Developed countries (b) Developing countries
A country can attain positive growth in population or negative growth in population depending on its birth rate, death rate, immigration rate and emigration rate. Many countries have recorded zero growth also, where population has remained same for several years.



