25,500 robots were sold in the US in 2012; $1.66 billion in revenue. This is a 17% year-over-year increase in units and 27% in dollars.
Robotics Industry Association (RIA) estimates that 225,000 robots are now working in US factories. This represents 10% robot density, i.e., only 10% of companies that could benefit from using robots have done so thus far.