 Students normally enter higher education as undergraduates from age 18 onwards, and can study for a wide variety of vocational and academic qualifications, including certificates of higher education and higher national certificates at level 4, diplomas of higher education, higher national diplomas and foundation degrees at level 5, bachelor's degrees (normally with honours) at level 6, and integrated master's degrees and degrees in medicine, dentistry, and veterinary science at level 7.Historically, undergraduate education outside a small number of private colleges and universities has been largely state-financed since the 1960s, with a contribution from top-up fees introduced in October 1998, however fees of up to £9,000 per annum have been charged from October 2012.There is a perceived hierarchy among universities, with the Russell Group seen as being composed of the country's more prestigious universities.