Circular Hole Pattern of Variable Depth

Is there a way to create a circular pattern of a hole with varying depth? I am using SolidWorks 2010 and do not see the "Vary Sketch" option discussed.  I would like to create a hole using hole wizard (or revolved cut if I must).  I want to make it parametric such that for each hole instance the hole-depth increases by an increment of 6 inches.

SolidworksParts And Features