The number crunchers over at the Pew Research Center have released another batch of market statistics today, this time, with a focus on tablets. According to the Center's latest survey, 19 percent of all adult Americans now own some form of tablet, marking a nearly twofold increase over figures from a poll conducted in mid-December. E-reader ownership, meanwhile, increased by exactly the same margin over this period, jumping from 10 percent to 19 percent. These numbers also signal a healthy acceleration from the middle of this year, when the slate and reader markets apparently stagnated, ahead of the holiday shopping rush. Overall, about 29 percent of US adults own either a tablet or an e-reader, up from 18 percent last month. You can find more stats and breakdowns at the source link below.