From 1996 to 2009, the percent of Americans who claim to have seen or been in the presence of a ghost has risen from 9% to 18%.
This would imply that American educational development could be reversing. The nation is 'un-educating' itself, if you will. It also means that one in five voters believes in ghosts.
Now, fair enough, probably more than one in five investors believes in efficient markets. But still, this Pew data is ridiculous. (Via Modeled Behavior)