Amir,
Thanks for this. I mean WOW for lack of better words. I'm especially impressed with the inclusion of the weighted scores which allows the observation of small changes in quality. I was going to suggest that you could do the same thing for the end of every year, say for the last 5 years, so that we can see the improvement in articles - but that would be too much to ask. But then I noticed you are planning on doing this monthly. Double WOW. Minor quibble - their are lots of disambiguation pages included. I'd delete those if possible.
Thanks again, Pete PS - WOW