It is the percentage increase in the growth of population per year. The rate or pace of population increase is studied in per cent per year. Rate of increase of 2 % per annum means that in a given year, there was an increase of two persons for every 100 persons in the base population. This is referred as annual growth rate. India’s population has been steadily increasing from 361 million in 1951 to 1028 million in 2001.
