Very interesting results.
My analysis is - kids below 10 have no access to internet even if they like CID.
People between 10 and 19 have access to some extent but are restricted from excessive TV watching and net surfing by parents. They are also busy with board exams, so that is another limiting factor.
Between 19-22 have some more freedom, as they are grown up now, so parents cannot restrict net surfing etc to that extent. Hence max no of people in this group.
22 and above - people are mostly busy with their jobs etc...so they spend comparatively lesser time watching re-runs all day and have less time for such detailed analysis of CID on such forums.
Those who are in this group are people started watching CID right from the beginning, remember all old episodes and are die-hard fans.