How much mail?

[jesimika]

Does anyone know, on average, how much mail was handled by Royal mail in the 1970's??

I need to compare Royal mail stats then and now.

Thanks x

[Paul_Hints]

This answer may be nearly 3 years late (There is no pun intende here re al Mail and getting a reply)...but would The Royal Mail have the answer, I feel sure they should keep such stats for budgetting/pricing purposes?