• Data reference period
• Place of residence (NUTS - 2013)
• Sex

• PRE-PRIMARY EDUCATION:  Optional education sub-system for children aged between three years and the typical age for entry into primary education. It is conducted in own facilities, the so-called kindergartens, or are included in school units where the primary education is also provided. The educational aim of pre-primary education is to provide a bridge between the home and a school-based atmosphere, in a close cooperation relationship.
• REFERENCE PERIOD:  The length of time for which data are collected, e.g. a specific day, month or year.

(Five year old children enrolled either in pre-primary education or in the first year or primary education) / (Resident population with 5 years old)