This is residential investment in the United States as a fraction of GDP.

美国国内生产总值的一部分,就是住宅投资

金融市场课程节选 : 耶鲁公开课

You take total household debt and total federal debt and combine them, and you got a kind of national indebtedness 168% that's about 168 percent of GDP.

将美国所有家庭债务总额,加上联邦政府债务总额，得出整个美国的债务状况,整个债务量竟是GDP的。

经济学课程节选 : 斯坦福公开课