| http://www.w3.org/ns/prov#value | - The estimates are published in NPD???s report, Games Market Dynamics: US ??? released by The NPD Group in February 2014 - and are derived leveraging NPD???s portfolio of physical POS tracking (Retail Tracking Service) and consumer research including the Games Acquisition Monitor, Video Game and PC Game Subscriptions Report and Consumer Tracking Service.
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