As user 100,754, I am ranked in the top 0.12%, current #830 based on 2,139 answers and 33 questions
https://stackoverflow.com/users/100754
Some of my useful answers get no upvotes: https://stackoverflow.com/a/18162345/100754
And some just keep accumulating :-)
https://stackoverflow.com/a/1763683/100754
Now, if you look on the ranking pages, you'll see the following table:
Total Rep* Users
-----------------------
100,000+ | 1,007
50,000+ | 2,879
25,000+ | 7,533
10,000+ | 23,325
5,000+ | 50,374
3,000+ | 85,384
2,000+ | 125,638
1,000+ | 229,491
500+ | 398,573
200+ | 675,767
1+ | 14,875,253
So, the site has 14+ million users with no real activity and the percentile ranking is based on users with 200+ points.