Although, unexpectedly this is not due to a growth in the number of discouraged workers. It's not clear where they went. See http://www.motherjones.com/kevin-drum/2012/09/why-did-labor-...
In fact, by some unofficial counts, like this one http://www.opednews.com/articles/Real-Unemployment-at-23--by... , total unemployment may be as high as 23% right now. Nor is this the only one, this sight is pretty lefty, two recent essays on the conservative site VDare.com have given similar estimates (22%) for current total unemployment.