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.
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.