It is most likely because you're including May and this month is incomplete. In June, it's possible when you run the numbers again it will show a different pi

It is most likely because you're including May and this month is incomplete. In June, it's possible when you run the numbers again it will show a different picture, similar to if you review the months past. That is what I've observed at least when using gs.statcounter. Hopefully this is the case.