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The amount of information consumed by Americans in 2008 totaled 3.6 zettabytes and 10,845 trillion words, according to a report released Dec. 9 by researchers at the University of California at San Diego. For an average person on an ordinary day, this represents 34 gigabytes and 100,500 words. "I think the primary finding of this report tells us humans have a finite capacity to receive and process information," said lead researcher Roger Bohn, a professor of management and director of the Global Information Industry Center at UCSD.
So we get 11.8 hours a day not including work. Let's say we work for 8 hours - when do we sleep.
Also, ignoring data during the day would essentially cut out all the time people spend at their desk jobs - on the internet.