The Turkish economy's total turnover saw an annual decrease of 20.9% in April, the nation's statistical institute reported on Friday.
The Turkish Statistical Institute (TurkStat) said turnover in industry slipped 24.9% during the same period.
On the services side, the turnover index declined 23.9% and the figure in trade fell 17.4% year-on-year.
The construction sector's turnover dropped 19.6% on a yearly basis in the same month.
The official report also revealed that Turkey's seasonally and calendar-adjusted total turnover index -- shows monthly change -- plunged 24.5% in April.
According to TurkStat's definition, turnover is an important short-term indicator used to assess the country's economic situation.
Turnover indices are composed of sales of goods and services invoiced by enterprises in the reference month over a certain period, to monitor developments on a quarterly and yearly basis.
All enterprises that declare their value-added tax payments to the country's Revenue Administration are included in the turnover index calculation.