Elderly women exercise at a day care facility on Gogo Island in Matsuyama, Ehime Prefecture, Japan, on Friday, March 22, 2013. A combination of the world's highest life expectancy, the world's second-largest public debt and a below-replacement birthrate is straining the nation's pension system, prompting the government to curb payouts, raise contributions and delay the age of eligibility. Photographer: Yuriko Nakao/Bloomberg via Getty Images
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