Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
List of Commonwealth of Nations countries by GDP (PPP)
This is a list of Commonwealth of Nations countries by gross domestic product at purchasing power parity (PPP). Gross domestic product is the value of all final goods and services produced within a nation in a given year. The GDP dollar estimates presented here are calculated at market or government official exchange rates. Values are given in millions of US dollars. Dependent territories are shown in italics and are not ranked, and their flags are shown alongside the country of which they are a territory.