A study from the University of Gothenberg found that people with low income and low-educated people spend the most time on Facebook.
And within this group, those who spent the most time on the site were less happy and less content with their lives.
Up to 85 percent of Facebook users surveyed said they logged into the social networking site on a daily basis.
And 26 percent of them felt 'uneasy' if they didn't log in regularly.
Women spend an average of 81 minutes per day on Facebook.
Whereas men spend 64 minutes per day on the site.