The National Statistical Institute (NSI) is a state institution in Bulgaria that collects, processes and disseminates official statistical information on social, economic and demographic processes in the country. The NSI's activities are aimed at providing objective and reliable data that support informed decision-making by the state, business and society. The Institute works in accordance with international statistical standards and is an active participant in the European Statistical System.
The total construction cost index increased by 0.9% in the first quarter of 2026 compared to the previous quarter, and by 14.0% compared to the same quarter of 2025.
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