Kim's figures are dated from back 2007 but she is a terrible catalog seller so these number aren't definitley not much different than seven years ago.
NOTE: I'm saying that she is because we just got numbers for Hilary's sales and one her albums took months to sell 1k - consider that Duff is a bigger act than Kim so Kim sales are probably stucked at these numbers since then.
The Pink Friday has sold more than any Kim album there and is definitley bigger than any Kim album especially when Nicki released on the digital market.