1973, value added in manufacturing was the sixth highest in Sub-Saharan Africa. Economically, Mozambique was a source of agricultural raw materials and an earner of foreign exchange. It also provided a market for Portuguese manufacturers which were protected from local competition. Transportation facilities had been developed to exploit the transit trade of South Africa, Swaziland, Southern Rhodesia (which became Rhodesia in November 1965), Malawi, and Zambia, agricultural production for export purposes had been encouraged, and profitable arrangements for the export of labour had been made with neighbouring countries. Industrial production had been relatively insignificant but did begin to increase in the 1960s. The economic structure generally favoured the taking of some profits to Portugal rather than their total reinvestment in Mozambique because counterterrorism campaigns were expensive. The Portuguese economic interests in its overseas province, which dominated in banking, industry, and agriculture, exerted a powerful influence on policy and by early 1974 were fostering good levels of economic growth and development. Education Mozambique's rural population was largely illiterate. However, some thousands of Africans were educated in religion, the Portuguese language, and Portuguese history by Catholic and Protestant missionary schools established in cities and in the countryside. In 1930, primary schooling became racially segregated. Africans who did not hold assimilated status had to enroll in "rudimentary schools," whereas whites and the few thousand assimilated Africans had access to "primary schools" of better quality. Starting in the early 1940s, access to education was expanded in all levels. Nevertheless, "rudimentary schools" retained their poor quality. In 1956, there were 292,199 African students enrolled in first grade. Of these, only 9,486 had successfully passed third grade in 1959. By 1970, only 7.7% of Mozambique's population was literate. A comprehensive network of secondary schools (the ) and technical or vocational education schools were implemented across the cities and main towns of the territory. However, access to these institutions was largely limited to whites. In 1960, only 30 out of 1,000 students of the Liceu Salazar were Africans, in spite of whites making up only 2% of the Mozambican population. In 1962, the first Mozambican university was founded by the Portuguese authorities: the . Sports The Portuguese-ruled territory was introduced to several popular European and North American sports disciplines since the early urbanistic and economic booms of the 1920s and 1940s. This period was a time of city and town expansion and modernization that included the construction