In some developed countries, such as the United States, the figure is 10 percent across its total population.

在某些发达国家，比如说美国，这个数字占总人口的10%。

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In the UK there are thought to be more than 9, 000, the majority of them women, and that figure is currently rising at 5% a year, with some population predictions suggesting a total of more than 58, 000 by 2032.

BBC: Centenarians 'depression prone'