I suggest that a legend for the columns should be added somewhere on the page, to improve the usability.
If you hover over the numbers, it summarizes at what each number represents. The left column is "total score", which is a value equal to upvotes - downvotes on all non-CW answers where upvotes > downvotes. The right column is "number of answers provided", which is the number of answers posted that qualify for your score; it shows how many non-CW questions have positive score.
A legend may help usability better, perhaps. All I know is that the hover is quite consistent with a fair amount of the rest of the numbers on the site. I've never been to that page before, so I just guessed to hover in order to figure what they were.