Oregon Economic Puzzles: Unemployment

There are many, I'll talk about a few more in the coming weeks but here is one:

Oregon's unemployment routinely exceeds the national average.

But the unemployment insurance 'exhaustion rate' - the percentage of folks who get UI that remain on it for the full 26 weeks - is routinely lower than the US average (except during recessions when we creep up to the average).

One theory is that we are are of work more frequently but for shorter spells.  Other theories? Explanations?  I await your expertise...