By the end of 2014, there will be 89.5 million tablet owners in the United States according to a new forecast, meaning one in three web-connected Americans will own a tablet. Of those 89.5 million people, 68% will own iPads. Market research firm eMarketer recently published its tablet forecast for the next three years and it determined that tablet growth will slow over the coming years, as will iPad sales. The firm estimates that there will be 33.7 million tablet owners in the U.S. by the end of 2011. That number will grow 62.8% to 54.8 million in 2012, and another 37.9% to 75.6 million by the end of 2013. Growth will then drop to 18.3% in 2014 according to eMarketer. Over the same period of time, the firm sees Apple’s market share in the U.S. dropping from 83% in 2011 to 76.4% next year, and then further declining to 68% in 2014. Two tables detailing eMarketer’s predictions follow below.