Unlocked Achievement Rarity/Attrition Stats

[Hexadigital]

I'm not sure where the best place on the site to put it would be (is there a player stats section yet?) but I'd love to see something that shows the rarity/attrition rates of achievements you've unlocked, something similar to what Steam Hunters has:

If implemented, it'd also be nice if it had toggles/filters for showing hardcore-only, softcore-only, and mixed stats.