Initial economic development in the UAE during the 1950s and 1960s was based heavily on the oil and gas industry, since diversifying into manufacturing, construction and commerce.[17] The oil and gas sector accounts for approximately two thirds of the UAE’s revenue, employing one percent of the work force while Trades and Repairs Services, Construction ad Manufacturing account for 50% of the work force.[18] In the past decades, high population growth in the UAE has been accompanied by high economic growth.