institute@ (Adds seasonally adjusted rate, background)
ISTANBUL, Aug 15 (Reuters) - Turkey's unemployment rate declined to 12.8% in the April-June period, data from the Turkish Statistical Institute showed on Thursday, but the seasonally adjusted rate climbed to its highest on record.
Unemployment surged to a decade high of 14.7% in the December-February period as economic activity slowed after a currency crisis saw the lira lose nearly 30% last year. As a result of the crisis, the economy contracted annually in the last quarter of 2018 and the first quarter of this year.
Year-on-year, unemployment rose 3.1 percentage points to 12.8% in the April-June period, the data showed. In the March-May period it stood at 13%.
The seasonally adjusted unemployment rate hit 14% in the same period, its highest level in the statistical institute's data going back to 2005.
The non-agricultural unemployment rate was unchanged from a month earlier at 15%, the data showed.
The unemployment rate had surged to 14.7% in the December-February period, its highest level in a decade. (Reporting by Birsen Altayli Writing by Ali Kucukgocmen Editing by Daren Butler and Dominic Evans)