How many White Anglo Saxon Protestants are really at Oxbridge and Yale?

I'm trying to decide what school to apply to this year, and the dating pool is a HUGE factor to consider (my plan is to marry rich). 
 

Does Oxford, Cambridge or Yale have more WASPs (females)? 
 

If they do not have them in abundance, what schools in the world practically only accepts WASPs?

I know you're all busy professionals so thanks in advance for taking the time to answer my inquiry.

Best of luck,

-Barry B. Helman