Greece's jobless rate rose to 27.4 percent in the first quarter of 2013 from 26 percent in the previous three-month period as economic activity slumped, the country's statistics service said on Thursday.
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It was the highest quarterly unemployment rate since this data series started in 1998. The jobless rate in the first quarter of 2012 was 22.6 percent.
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Greece has already published monthly unemployment figures up to March.