In 2008, Canberra lifted restrictions on university enrolments, in order to make tertiary education more accessible to students from socioeconomic groups which had previously had relatively low levels of education. However, since federal funding to each university is largely determined by student numbers, this created an incentive for universities to increase their enrolments by accepting students with weak academic skills. In response to falling graduation rates and academic standards, along with rising grants to the tertiary sector, Canberra will freeze grants at 2017 levels for two years, followed by increases according to population growth and university performance. Graduates in high-paying jobs will have to put a certain percentage of their income toward repaying their student debts.