[1] A research of 3D printer market by Gartner has shown that the shipment of 3D printers (3DPs) will almost double every year between 2015 and 2018.
[2] The research estimates that global shipment of 3DPs will reach 2.3 million by 2018.
[3] The 3D printer market is made up of seven technologies, where the market growth being led by material extrusion.
[Source] http://www.arnnet.com.au/article/559292/double-trouble-3d-printer-market-continues-mega-growth/