Tablet - American Tablet Users & Penetration, 2010-2015

By the end of this year, eMarketer estimates the number of US tablet users—defined as anyone who uses a tablet at least once a month—will reach nearly 70 million, up from 34 million in 2011. At that point, roughly 30% of internet users will use a tablet at least once a month.
Read the rest at eMarketer.