Because of the Soviet Union's emphasis on total access of education for all citizens, which continues today, the literacy rate is an estimated 99.4%. Since 2005, an eleven-year school programme has been replaced with a twelve-year one: primary education takes four years to complete (starting at age six), middle education (secondary) takes five years to complete; upper secondary then takes three years. In the 12th grade, students take Government tests, which are also referred to as school-leaving exams. These tests are later used for university admissions.