Nearly 25% of Bulgaria’s economy is in the gray sector, data of a research of the Center for the Study of Democracy show. The gray sector represents the services which are yielding profit, yet that profit is not officially registered. According to the report, the levels of shadow economy have been decreasing over the past 15 years. The Bulgarian tax offices managed to reduce the share of gray economy. Traditionally, highest shares of shadow economy are registered in agriculture the service sector and construction, where levels of seasonal employment are high and tax inspections are made more difficult.