Some quick math makes that a 4.5% drop in population.  On top of 12.6% unemployment.  Granted, some of the former Michiganders are, no doubt, children below the age of employment.  So you can't just add the two figures together for a grand total "Adjusted Unemployment" figure.  But just for the sake of trying, you could assume that about half of the persons leaving the state are adults lacking a job.  Since a lot of these persons are supposedly our recent college graduates, there are probably less children than the typical "average family unit" figure would suggest.  Anyway, that would give you a total (completely speculative and impossible to prove) "Adjusted Unemployment" figure of around 14.5-15%.