Answer

National income

In simple term we can define national income as total value a country’s final output of all new goods and services produced in one year. In other words we could say that national income is total amount of money earned within the country. It is measure the level of the country’s economic activity in a given time period. National income counts the level of activity in accounts such as total revenues earned by Domestic  corporation, wages paid to foreign and domestic workers, and the amount spent on sales and income taxes by corporation and individuals residing in the country

. National Income  for the year 2014 in the US $ 14,941,050,770,221