Based on the amount of people who promised to move to Canada if Trump won, my guess is next to nothing.
Beside, when was the last time a conservative said, dammit, Bill won, or Obama won, I'm off to [some country]. It's mostly Dems who almost never actually go through with it. Sure, you get a very small trickle but nothing like they promise.
[1]http://mynorthwest.com/470605/oregon-california-washington-s...?
If you mean, follow the patterns of suggesting if so-and-so wins, I'm out, a number of Republicans did that with Obama (and maybe the Clinton reelect in 1996.)
Though in the wake of the 2008 Obama win, there was also a big upswing in conservatives not specifically saying it about themselves, but predicting the wealthy in general would economically rebel by withdrawing from the economy and “Go Galt”.
What I do notice about conservatives is a rush to "buy guns" --that's their knee jerk moreso than, "screw it, I'm leaving."