Per the numbers Wolfram Alpha is giving, the increase seems to be close to $8 trillion nominally, which amounts to something over $5 trillion in 2000 dollars.

Per the numbers Wolfram Alpha is giving, the increase seems to be close to $8 trillion nominally, which amounts to something over $5 trillion in 2000 dollars. Edited to add: I wondered how much of this was population growth, and certainly there has been some but real GDP per capita has grown about $5k over that period.