From Pew Research:
Nearly nine-in-ten Americans today are online, up from about half in the early 2000s. Pew Research Center has chronicled this trend and others through more than 15 years of surveys on internet and technology use.
On Thursday, we released a new set of fact sheets that will be updated as we collect new data and can serve as a one-stop shop for anyone looking for information on key trends in digital technology.
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Direct to Internet/Broadband Fact Sheet