So that multiplies out to a U-3 of 13.1% and a U-6 of 24.5% (based on December 2008 figures and simple maths). If you take the U-6 as the closest measure to the figure used then (which I'm not at all sure is valid - I don't know that part-timers would have been counted as unemployed) then you're looking at near-1933 situation, but not quite 1933.

But I don't know how unemployment was calculated then, and my google-fu is failing me. Some numbers I'm seeing imply that this would be much higher than that, but they are from sources I don't consider trustworthy. Do you know?