What was the highest level of real GDP prior to the last recession?

Stacked GDP and the Measurement of Progress Ask FRED ALFRED I 18,000 The accompanying graph depicts quarterly Real GDP in the United States. ins of Chained 2009 Dollars 16,000 Real GDP is measured in billions of 14,000 dollars. 12,000 10,000 8,000 6,000 4,000 2,000 1960 1970 1980 1990 2000 2010 1950 Source: U.S. Bureau of Economic Analysis a. What was the highest level of real GDP prior to the last recession? Enter your answer in billions of dollars and round your answer to one place after the decimal. billion