OP here is some 1st year data for all consoles, except switch, that may be helpful for comparisons.
http://gamrconnect.vgchartz.com/thread.php?id=151051
It'll be interesting to see if Switch can hit 10M by end of 2017 which would be its first 10 months considering it took Wii 9 months, PS4 10 months, and XboxOne 14 months. All others took a lot longer.







