• Data reference period
• Place of residence (Portugal)
• Age group

• RESIDENT POPULATION:  Set of persons who, regardless of being present or absent in a given housing unit at the moment of observation, have lived in the place of their usual residence for a continuous period of 12 months prior to the moment of observation, or have arrived to the place of their usual residence during the period of 12 months prior to the moment of observation, with the purpose of living there for a year, at least.
• EDUCATIONAL LEVEL:  Level of the education and training system that is structured according to pre-school education and study cycles of educational levels such as: 1st cycle, 2nd cycle, 3rd cycle of basic education; secondary education, post-secondary non-tertiary education; pre-bologna bachelor's degree, bachelor's degree, master's degree and doctorate in tertiary education.
• AGE GROUP:  The age interval in years to which a person belongs at the time of reference.
• TERTIARY EDUCATION:  Level of education that succeeds to upper secondary education, characterized by high complexity and specialized learning, oriented to the transition into the labor market.
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).

(Resident population with higher education/ Resident population aged between 30 and 64 years old)*100