“The largest number of adolescents in history is coming of age world-wide. All told, some 1.2 billion people — one person in five — are between ages 10 and 19, according to the United Nations Population Fund. In the U.S. alone, there are more than 29 million teenagers, with their numbers growing at twice the rate of the overall population.” (Source: WSJ, 11/30/07)

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