According to iGR, as much as 86% of in-home broadband data use will be over WiFi in 2017.The research house is basing its estimates on four different usage categories (Light, Medium, Heavy and Extreme. A Light household (per iGR's definition) consumed about 29 GB/month in 2012, of which about 15.5 GB was driven by WiFi. An Extreme household in 2012 consumed about 395 GB/month, of which about 225 GB was driven by WiFi.