Interesting read. 2015 is 68 page report. Don't know how to link that one. Haven't read it a yet.
http://www.qdma.com/corporate/white...aign=Ntl+Newsletter+01/22/15&utm_medium=email
http://www.qdma.com/corporate/white...aign=Ntl+Newsletter+01/22/15&utm_medium=email