Who uses Twitter - and how much?
www.mediapost.com/publications/article/140937
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Twitter, like Facebook, may have quickly become one of the Internet's best-known brands in recent years, but only 8% of American adults online are using the microblogging service, according to a new study by the Pew Research Center's Internet & American Life Project. That figure equates to 6% of the total U.S. population.