Niller sent me the purity test: an excel spreadsheet, that calculates your purity. Several of my friends sent me their results, which can be seen in the following table (their names has been changed to protect the innocent):

As far as I know the highest possible score is 416.

I recently took the test again, and my results "improved": Score = 141, Total = 50, Drinking = 66, Drugs = 12, Sex = 44.