Question: How much of the u.s. national debt is owed to foreigners?
qaPairs: question: In 2015, how much of the u.s. national debt is owed to foreigners?
answer: 34 percent
question: In 1988, how much of the u.s. national debt is owed to foreigners?
answer: 13 percent
question: In 2008, how much of the u.s. national debt is estimated to be owed to foreigners?
answer: 28 percent