"Depending upon the year, between 36 percent and 42 percent of Philadelphia residents who are mailed a summons fail to respond," says the report released Wednesday by the First Judicial District, the Philadelphia court system. "This high nonresponse rate raises a potential threat to the court's ability to provide sufficient panels of would-be jurors for civil and criminal trials and results in the court's excessive reliance on those who do fulfill their civic duty by responding to the summons for jury service."