From a study of 2003, updating the 2000 study and comparing the evolution of estimated information production (paper, film, magnetic, optic)- How much Information?:
"Contrary to notions of paperless offices floated in the late 80s and early 90s, the consumption of office paper has gone up substantially in the recent years, especially following the move to laser/inkjet printers from dot matrix printers. Paper use in offices has further risen with the increasing speed of laser printing coupled with its decreasing cost. Each year, almost 500 billion copies are produced on copiers in the United States; nearly 15 trillion copies are produced on copiers, printers, and multi-function machines. (Source: XeroxParc)."