Well, first of all I've never been higher than 97 - but I doubt that anyone recalls the day that they created an account on Hubpages. Well, never mind - there probably ARE people that keep up with that type of info.
Interesting question, and people are forever wondering about author scores. I, of course, want mine to be higher than it is as well. . . .but I've talked to people who typically have a score of a hundred to 97. . . .and they often say that they don't know why they are ranked so high either.