• Data reference period (Month)
• 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.
• 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).
• ACTIVITY RATE OF THE WORKING AGE POPULATION:  Rate that defines the relation between the labour force and the working age population.
• AGE GROUP:  The age interval in years to which a person belongs at the time of reference.

(Active Population aged between 16 and 74 years old/ Resident Population aged between 16 and 74 years  old)*100