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Pedestrians walk along the waterside past the dock and port area in Stavanger, Norway, on Tuesday, March 4, 2014. Norwegians debt burden has passed 200% of disposable income compared to 110% in U.S. before housing bubble popped, economist Paul Krugman said to newspaper Dagens Naeringsliv. Photographer: Kristian Helgesen/Bloomberg via Getty Images

Pedestrians walk along the waterside past the dock and port area in Stavanger, Norway, on Tuesday, March 4, 2014. Norwegians debt burden has passed 200% of disposable income compared to 110% in U.S. before housing bubble popped, economist Paul Krugman said to newspaper Dagens Naeringsliv. Photographer: Kristian Helgesen/Bloomberg via Getty Images