Generally I get one new per year on average
The most I've bought in a single year has been two
Last purchase was June 2015 as I cracked a frame (bought a full build second hand & swapped some parts over from the old one)
Got a DH rig in June 2014 as I fancied one
Can't see myself buying anything new for the foreseeable future due to the lack of new 26" wheeled bikes & the constant changing of which wheel size is "the best" by manufacturers