Expenditure on educational institutions reaches 17.7% of total public expenditure, among the highest rates in OECD countries. The largest portion of expenditure on educational institutions is from public sources (58.0%), as in other OECD countries, but Chile has the largest share of private funds among all OECD countries (42.1%, compared to the OECD average of 16.4%), as a result of high private funding of tertiary education. Most of the private funds are from household expenditure.