In 2008, Americans consumed information for about 1.3 trillion hours, an average of almost 12 hours per day. Consumption totaled 3.6 zettabytes and 10,845 trillion words, corresponding to 100,500 words and 34 gigabytes for an average person on an average day.
-- Roger E. Bohn and James E. Short, How Much Information? 2009: Report on American Consumers, Global Information Industry Center, University of California, San Diego, 12/9/2009.