A pundit who would remain anonymous did a back of the envelope computation:

[Linked Image from s9.postimg.org]

So, to NW_P's point: it may very well be too low.

"The liberals can understand everything but people who don't understand them."
Lenny Bruce

"The cleverest of all, in my opinion, is the man who calls himself a fool at least once a month."
Dostoevsky