You hear 6% or so, others estimate 15%, but I'm not sure anymore.
I'm not working, partially for medical reasons, but I was an employee at another corporation. I had my own corporation for many years.
Once you get laid off, you get on the rolls as "unemployed" but if you were a consultant, you don't count as unemployed. Once your unemployment benefits run out, you're not "unemployed". If you take a lesser-paying job, you're under-employed, but not officially "unemployed".
Some areas (like Detroit) have huge levels of unemployment, other areas (like New Hampshire) have unemployent near normal levels, but if your unemployment runs out and you used to make $110,000 a year, and now make, say, $21,000 as a manager at McDonalds, you're technically not "unemployed" but you're certainly UNDERemployed.