I tired to do a quick look but the effort lies somewhere between 'would take a lot of research' and 'cannot be done'. Many of the Confederate records are gone so there aren't good counts. In 'Confederate Cannon Foundries' it looks like at one point Tredegar was making one every 3 days but that was not always the case. And, especially early on, some significant percentage of them were rejected. In the book Riley indicates that had the Civil War not come along Tredegar would have likely gone out of business since they had not adopted the Rodman method of casting and the US government would only buy that type. Then there are the foundries for which there are no surviving records indicating production.