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Number of Twitter Users in USA
The number of users on Twitter just keeps growing by the day. A new study predicts that the number of Twitter users from USA will cross the 25 million mark by next year. Here are the numbers:
2008 : 6 million (3.8% of all adult internet users)
2009 : 18 million (11.1%)
2010 : 26 million (15.5%)