Translate the following English sentence to French:
"Mr President, the present proposal reinforces, improves upon and tightens up on the voluntary eco-labelling system which has existed in the EU since 1992 and which has not, unfortunately, been as successful as had been hoped."
Monsieur le Président, la proposition qui nous est présentée renforce, améliore et rend plus strict le système d'étiquetage environnemental qui existe dans l'UE depuis 1992, et qui, malheureusement, n'a pas obtenu le succès escompté.