When the value of unpaid housework was not used in computing the annual measurement, Simon Kuznets quit the Commerce Department in protest.  
During the 1930's the originator of this concept computed its value back to 1869.  This data was used to support his 15-20 year namesake cycles of production and prices based on this quantity.  There appears to be an inverted U-shaped curve between this figure and income inequality.  When the value of unpaid housework was not used in computing the annual measurement, Simon Kuznets quit the Commerce Department in protest.  FTP, name this figure defined as the sum of consumption plus investment plus government spending plus exports minus imports.
During the 1930's the originator of this concept computed its value back to 1869.  
gross national product or GNP