Translate the following English sentence to French:
"Since 1995, France has had a central office for the prevention of illegal immigration and employment, which has greatly enhanced its action in breaking up criminal networks in the last two years."
La France dispose depuis 1995 d'un Office central pour la répression de l'immigration irrégulière et le travail illégal, qui a fortement développé ses actions de démantèlement de filières depuis deux ans.