Merci Digby !!
I found the informations in a book by Dominique and Michèle Frémy called "Quid", that the French knows very well - ( This book is one of the usual new-year present'
In the EDITION 2002, page 1854 - Chapitre : Fortunes, salaires et prix - Note on " Evolution - Chefs d'Etat - France."
They have a site ( http://www.quid.fr/2004/84_15.htm), but you need a credit card !!!! : ), or to ask Santa Klaus.