It's due to the sheer number: over 10M teachers. So there's simply a lot of them (in absolute numbers) that ended up marrying a 1%-er, even if its percentage-wi

It's due to the sheer number: over 10M teachers. So there's simply a lot of them (in absolute numbers) that ended up marrying a 1%-er, even if its percentage-wise not out of the ordinary. You can see that the color is very pale, and only slightly darker for college and universities.