Translate the following English sentence to French:
"The effect of the "Television without Frontiers" Directive has been that a large percentage of national works are still broadcast in each country, without managing to have these works circulated between countries."
La directive "Télévision sans frontières" a eu pour effet de maintenir dans chaque pays un fort pourcentage de diffusion d'uvres nationales, sans réussir à susciter la circulation de ces uvres d'un pays à l'autre.