[squid-users] Squid Cached Object Statistics Report

Hello Squid Developers & Users
I want to generate Graph showing Distribution of various sized cached
objects
U can see the link: http://www.isp-planet.com/img/cflow-...ts-distrib.gif
[This is the graph of Cache Flow] I want simillar kind of things for squid.
Squid has to provide Data only. Obviously Its visual appearance is not its
talk
What data structures I should refer to achieve it?
--Atit Jariwala