Translate the following English sentence to French:
"The Chief Commissioner of Police, Svend Frederiksen, has expressed his desperation at the fact that he constantly has to make do with less than half the manpower which was agreed."
Le commissaire de police en chef, M. Svend Frederiksen, a fait part de son désespoir, précisant qu'il lui manquait toujours plus de la moitié des effectifs promis.