How often do you buy new gaming hardware?

[Jranation]

Since the PS2 (Which I think i bought it when the PS3 was just released) Ive bonly bought Nintendo consoles.

Cant exactly remember when i bought the Ps2, DS, and Wii.

But I bought the 3DS in its first year around nov or dec. Then the Wii U 2 weeks after it came out.