Hi People! Due to a project I'm currently working on, it would be very usefull to obtain information about: total hours of documentaries produced in the USA (per year); type of documentaries (nature,history, science, others...), main tv channels whith significant amount of of documentaries exhibition, total amount of hours actually exhibited, % of exhibition in prime time. Can someone help and direct to some site or institution able to provide this information? If not all, at least part of it. Ant help would be greatly appreciated... thanks in advance.