Question

what do you mean by per capita income

Answer 1

Per Capita income of a country is the average income of a person in the country. It is the total earning of people in the country plus earning of people outside the country (NRIs) minus earning of people from other countries.
So it is total earning of people of a country all over the world by number of people.

Answer 2

per capita income means average income earned per person in a specified year