(financiamiento compartido or "shared funding", also known as copago or "copayment"), which is voluntary for the parent. Enrollment and tuition fees are forbidden in pre-primary and primary school in these institutions. A fee to the so-called Parents Center (Centro de Padres) is voluntary and cannot be higher than 0.5 UTM (Unidad Tributaria Mensual or "Monthly Tax Unit") a year (payable in up to ten installments), which was CLP$19,143 (about US$40) in 2011. Mandatory tuition Public schools and subsidized private schools have the same selection and annual enrollment costs as in schools with voluntary tuition, but they are allowed to charge a mandatory monthly tuition, which cannot be higher than 4 USE (Unidad de Subvención Educacional or "Education Subsidy Unit"). This was equal to CLP$72,763 in 2011 (about US$150) in both primary and secondary school. A Parents Center fee is the same as in schools with voluntary tuition. Non-subsidized private schools are free to set the price, which may include enrollment and tuition costs, as well as a fee for applying to the school (paid once) and one for being admitted to the school (also paid once, and can be quite high in some exclusive schools). There may be other payments, such as to the Parents Center or for school materials, which may be included as part of the tuition fee. There is a third type of public school, the so-called Delegated Administration schools, which are owned by the State but managed and financed by private corporations. These cannot charge a selection fee. The annual enrollment cost is voluntary and the same as in schools with voluntary tuition. They are allowed to charge for tuition, but it is up to the parent to decide how much to pay. The maximum cost is 1.5 UTM annually, which was CLP$57,430 (about US$119) in 2011. A Parents Center fee is voluntary. There is a fourth type of public school, administered by the Ministry of Education and completely financed by the State. Currently, there is only one such school: Escuela Villa Las Estrellas in Antártica. Higher education Admission University Students can choose between 16 public universities and 43 private . Used to be 60 Universities, but Universidad del Mar went into bankruptcy and will be no longer providing education. All public universities and 23 private ones use a single admission system called PSU (Prueba de Selección Universitaria, "University Selection Test"), designed and evaluated by the