Haven't looked into how accurate these are but it's mentioned fairly often. "Market leader Facebook was used by 79 percent of internet users" https://www.stati

Haven't looked into how accurate these are but it's mentioned fairly often. "Market leader Facebook was used by 79 percent of internet users" https://www.statista.com/statistics/246230/share-of-us-internet-users-who-use-selected-social-networks/ https://www.statista.com/statistics/246230/share-of-us-inter... "71% of online adults use Facebook" http://www.pewinternet.org/fact-sheets/social-networking-fact-sheet/ http://www.pewinternet.org/fact-sheets/social-networking-fac... "72% of all online US adults visit Facebook at least once a month" https://www.brandwatch.com/blog/96-amazing-social-media-statistics-and-facts-for-2016/ https://www.brandwatch.com/blog/96-amazing-social-media-stat...