Squid Non-cacheable HTTP Object Reporting

Hello Squid Developers & Users,
I am usnig squid 2.5 stable 2 on redhat linux 7.x. There are certain HTTP
Tags that cause cache-engine not to cache the objects such as Cache-Control:
not cacheable, Http Response with Vary headers
I want to have reporting of such total no of objects and total no of bytes
hourly, daily,monthly basis.
Can any one give me idea of how to achieve it in Squid.
What Data Structure i should refer to achieve it?
Regards,
Atit Jariwala