Part 3 (1 point) By the end of 2009, the economy had recovered slightly; however, the economy was still smaller than it was two years prior. From 2007 to 2009, real GDP had fallen from $15,762 billion to $15,356 billion. How deep was the recession? Suppose that the long-run growth trend of real GDP was 3% per year. If the economy had grown at 3% per year since 2007, there was a shortfall of $ 1921 billion at the end of 2009. (Give your answer to the nearest whole number)