[support] excessive bandwith usage

[Larry]

Greetings all,

My site appears to be using too much bandwith. Iam on a shared hosting
server and my provider has told me I am using in excess of 16% whilst
I am only allowed 3%
It also appears there about 50,000 visitors a day to the site  which
is a bit alrming as I have less than 300 members,

What modules or scripts do you guys think are causing this excessive
bandwith usage?
I am running drupal 4.63

regards

Larry