Social media now accounts for 18% of time spent online, according to a new infographic.
Since 2006, the amount of time that the average person spent on social-networking sites has more than doubled, from 2.7 hours to 6.9 hours per month. More people are using social media, as well. While only 24% of Americans had a single social-media profile in 2008, 56% of Americans do now.
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