Xcode 6.1 beta 2 fixed 7 % of all open Swift crashing bugs (3 of 41 crashes).

Stats for previous releases:
* Xcode 6.1 beta 1 fixed 14 % of all open Swift crashing bugs (6 of 43 crashes).
* Xcode 6 beta 7 fixed 16 % of all open Swift crashing bugs (7 of 44 crashes).