Rejection rate is 100%. Asked one girl out this year, got rejected. Therefore, one attempt, one rejection, 100%.
Then I guess there is the saying, is you miss 100% of the shots you don't take. Guess that doesn't help either, but maybe that can also contribute to the rejection rate as well. On the other hand, there is no negative fall-out from that rejection, so it doesn't really mean anything.
I do have a score metrix that takes into account how women are responding to me in the environment (ie conferences, work, public, it has to be a strong enough interaction where I can remember the lady's name) and have a range of this matrix between - 10 to + 10. Last check it was somewhere between 0 to -1. It doesn't factor in if I actually ask anyone out, but looks at other things which either help or hurt the ego as a whole. You could feel good or bad depending within an environment regardless of if you ask anyone out or not. I mean, if you feel bad or intimidated to ask anyone out, then you could argue that a non-verbal rejection, or generally feeling you are not attractive/unwelcome might just come like rejection in and of itself.