Research firm In-Stat has offered some long-term outlook on tablet applications with a forecast for five-year growth of total worldwide tablet app downloads from under one billion in 2011 to more than 11 billion in 2015. It predicted that annual revenue for tablet applications would top US$15 billion by 2015. In addition to its prediction for better than 10x growth in worldwide tablet app downloads from 2011 to 2015, In-Stat projected that global downloads of all mobile applications would increase from more than 15 billion in 2011 to nearly 48 billion in 2015.