In the Web of Science, there were 13,592 peer reviewed papers (topic: additive manufacturing OR 3D printing as of 7 April 2018) during 2015-2017. This is a fairly large volume of literature and indicates the enthusiastic support of the research funding agencies in this area. How does the volume of research in this area compare with the industrial activity in this area? What is the value of all the 3D printed /AM manufactured products sold per year in recent years?