ABSTRACT
Index of Ageing A common measure of the ageing of a population is the proportion of elderly in the population. It is defined as follows:
It is usually given as a percentage. The proportion of elderly in Kerala according to the 2011 census is:
Trends in the Proportion of the Elderly Projection of the elderly population is on much safer ground than projection of the total population as the elderly population in the next 60 years already exists. For example, the elderly population of 2071 is already born by 2011. Future trends in the birth rate have no influence on the size of the future elderly.
