The average person uses about 4.5 gigabytes of data a month, up more than a third from the 3.3GB used on average a year ago, according to Brad Akyuz, a director at the NPD Group research firm who specializes in the mobile industry.
That’s partly because of increased video streaming, largely driven by social media use. Last year, more than 54% of all videos were watched on a mobile device—up from 17% in 2013, according to online video technology company Ooyala.
“When you stream video, the data numbers go up exponentially,” Akyuz says.
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See Also: Ooyala Video Index