A nation's prosperity is sometimes measured in terms of

A nation's prosperity is sometimes measured in terms of GDP per capita.

GDP stands for gross domestic product, or rather how much is produced/earned within a particular amount of time. Per capita is a Latin term which basically means per person - so based on how much each person produced/earns within a given time, a nation's prosperity and wealth can be measured.

GDP per capita

is a measure of the aggregate yield of a nation that takes total national output (GDP) and partitions it by the quantity of individuals in the nation. The per capita GDP is particularly valuable when contrasting one nation with another, on the grounds that it demonstrates the relative amount of achievements or grounds covered within that year by the nations