Answer:
Steady decline in total fertility rate and increase in life expectancy are key reasons for the trend and will lead to an increase in working age population and a drop in number of elementary school-going children.
explain Mortality rate??
A mortality rate is a measure of the frequency of occurrence of death in a defined population during a specified interval. Morbidity and mortality measures are often the same mathematically; it's just a matter of what you choose to measure, illness or death.