What is the average content of the Czech wolfdog?

[happyfeet]

Hi all, I am new to the forum, and what a fantastic forum it is, my question is what is the average % of wolf in this breed? % being F1 50% wolf 50% GSD, F2 being 50% wolf/GSD and so on, does anyone know how many times the Pure GSD was bred back into the breed? I have been researching wolf content and from what I read the wolf was introduced 4 times, but I may be wrong, but I can not find information about how many times the GSD was re introduced back in to the F's?
I understand that the larger the F number is the more domesticated the breed becomes but it still has the genetic makeup bassed on the %

So is it possible to trace back to find the %???