Chirac has been named in several cases of alleged corruption that occurred during his term as mayor, some of which have led to felony convictions of some politicians and aides. However, a controversial judicial decision in 1999 granted Chirac immunity while he was president of France. He refused to testify on these matters, arguing that it would be incompatible with his presidential functions. Investigations concerning the running of Paris's city hall, the number of whose municipal employees increased by 25% from 1977 to 1995 (with 2,000 out of approximately 35,000 coming from the Corrèze region where Chirac had held his seat as deputy), as well as a lack of financial transparency ("marchés publics") and the communal debt, were thwarted by the legal impossibility of questioning him as president.