Didn't vote as I cannot put a percentage on it - I simply don't know.
I'm Agnostic.
I would say that general agnosticism (doubt of whether there is or is not a god(s)) is anywhere from the second to sixth option. If you don't lean either way, then I guess you'd be a true agnostic, at the forth option.
My previous reply didn't come out too clear.
Maybe I should say rather: a-gnosticism is about knowledge, it says you
don't know, exactly that you don't know (with or without "can't know" as well), while the assertions with probabilities about God's existence imply that you know something. You need to know some things relevant to the case in order to make an statement about God's existence (= a claimed fact) or its probability (the probability of a claimed fact to happen).