Distribution of Flemish Facebook users in Belgium 2015, by age

The source explains that "to allow for representative results for Flanders, a minimum quota sample of N=1,500 is defined by province, gender, age (15+) and education level, based on the most recent federal statistics (referring to Statistics Belgium)."

The source adds: "digiMeter provides a snapshot view of the adoption and use of media and ICT. It is based on the self-reporting of media consumers. As such, the results should be interpreted as the perception respondents have of their own media consumption. The methodology does not allow for assumptions on the effective media reach."

* The source points out that "1,532 respondents (or 70.2 percent of the total sample) were collected offline by means of (tablet) computer-assisted personal interviews (CAPI) or paper and pencil interviews (PAPI). 649 respondents (or 29.8 percent) filled out the survey online (computer-assisted web interview or CAWI)."