If you want the data on UPSC CSE 2010 final result release in May 2011 for pairs of optional subjects and candidates selected therein then you can see this pdf file uploaded in a popular online forum by an IITian (Ramsundar, Guwahati).
This data has been released by him and is not an official UPSC document; it is thanks to skills of software professionals like him in IIT and elsewhere.