Statistics of how many people carry a cell phone in the United States?

can anyone tell me the statistics of how many people carry a cell phone in the United States and the source of where you are getting the information?

Statistics of how many people carry a cell phone in the United States?
In the United States, 66% of the population owns a cell phone: U.S. population stands at 297 million, with 197 million cell phone users. Collectively, people spent 675 billion minutes talking on cell phones in June 2005. The ring tones industry, which allows people to hear popular songs when their cell phones ring, is now a $5 billion a year market, an instructive instance of an ancillary industry arising from the ubiquity of the cell phone.
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