Steve,
That share message was a careless mistake on my part. I don't like to bother people when I grant them access to a file they might one day want to see (but probably won't).
It happened because it's a Google Drive default that I neglected to uncheck.
You will find a much nicer presentation of the same data on
dixonary.net under Player Ratings.
One of the goals of the ratings project is to produce indications of skill that are comparable across time, so we can really see how we rate against greats of the past. All the usual measures are unsuitable for that, because they are sensitive to number of players in the round, or number of rounds played. Dan Widdis is the main man in that project, and it's really him we have to thank.
P