Largest-portion-of-mandatory-spending-in-2007-economics-homework-help

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Data Hunt: (questions 9-10): Go to the Congressional Buget Office website, http://www.cbo.gov/sites/default/files/cbofiles/ftpdocs/89xx/doc8917/01-23-2008_budgetoutlook.pdf and answer the following: 

What was the largest portion of mandatory spending in 2007 (enter in billions of dollars, ex: if the table shows an entry of $674 billion under 2005, then enter 674)?