Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

Exercise 4

Use this graph to compare the per capita gross domestic product (GDP) with the per capita genuine progress indicator (GPI) in the United States between 1950 and 2004 (the latest year for which this data is available).

What was the monetary difference between per capita GDP and per capita GPI in (a) 1950 and (b) 2004