Primary education is compulsory in Tanzania, but not enough schools are available to accommodate all of the children, and only 66 % of eligible children are listed. It is around that 92 % of people over the age of 15 are literate. In 1997 government and private schools were attended by 4.1 million elementary pupils and 234,700 secondary students. Institutions of higher education listed 17,812 students. Major schools include the University of Dar es Salaam (1961) and Sokoine University of Agriculture (1984), in Morogoro.