Internal facebook documents obtained by the verge. Tn users have declined by 13 % since 20 19 years old, i think it would match maybe what their growth issues are. The internal documents were part of those disclosures made in congress by facebook whistle blower francis howgan. Young adults between the ages of 20 and 30 expected to drop over 40% next year. Some research shows that young adults who use Facebook more than five times a week could be at risk for depression.