• Data reference period
• Place of residence (Portugal)
• Sex
• Highest completed level of education

• LIFELONG LEARNING:  Intentional learning developed throughout life, in formal, non-formal or informal contexts, within a personal, civic, social and / or professional perspective.
• 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.
• 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).
• EDUCATIONAL QUALIFICATIONS:  The degrees, diplomas, certificates, professional titles and so forth that an individual has acquired by study.
• SEX:  Biological and physiological characteristics that define men and women.

(Persons aged between 25 and 64 years old who participated en lifelong learning activities / Resident population aged between 25 and 64 years old)*100