Translate the following English sentence to French:
"It should be recalled that 80% of Community funds are managed at national level, and improving the financial management of the European Union budget could not therefore be contemplated without the cooperation of the Member States."
Il convient de rappeler que 80 pour cent des fonds communautaires sont gérés au niveau national : inutile, donc, d'envisager d'améliorer la gestion financière du budget de l'Union européenne sans l'implication et la collaboration des États membres.