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Business and employment-oriented social networking service that operates through websites and mobile apps. LinkedIn
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An online social media and social networking service based in Menlo Park, California. Facebook
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First large-scale video sharing website that makes it easy to watch videos online. YouTube
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A service for friends family and coworkers to stay connected through the exchange of quick, frequent messages. Twitter
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Lets you effortlessly share anything. Post text, photos, quotes, links, music, and videos from your browser, phone, desktop, email. Tumblr
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A visual bookmarking tool that helps you discover and save creative ideas. Pinterest
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The home for visual storytelling for everyone from celebrities, newsrooms and brands, to teens, musicians and anyone with a creative passion. Instagram
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A messaging app that lets users exchange pictures and videos (called snaps) that are meant to disappear after they're viewed. Snapchat
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An American live broadcasting service where users stream their own live video content or interact with the video streams of other users in real-time. YouNow
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A social media platform for creating, sharing, and discovering short music videos, think Karaoke for the digital age. TikTok
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I wasn't able to find any data from these years.