The rise of the modern smartphone addict, in three charts

More than nine in 10 Americans own a cell phone, and of those, nearly seven in 10 compulsively check for messages ... even when there's nothing there. As if that weren't proof enough that Americans have a serious smartphone dependency, a new report from the analytics firm Flurry suggests that "smartphone addicts" -- people who open apps 60 times or more a day -- are growing at more than five times the rate of regular users. In fact, while Flurry reports that its regular users (people who open 16...