The California Judicial Branch has the largest state court system in the US. The Supreme Court of California, its highest court, consists of a chief justice and six associate justices. The Courts of Appeals, founded by a constitutional amendment in 1904, has more than 100 justices in six appellate districts. Its Superior Courts, which include some 1,500 judges, review criminal and civil cases. Among California's court system agencies are the Commission on Judicial Appointments, the Commission on Judicial Performance, and Habeas Corpus Resource Center. The California Judicial Branch has an annual budget of about $3.7 billion.