To compare the first report of our anesthetic experiences with 16,457 Cases performed by the Department of Anerthesiology of Wonju Christian Hospital, Wonju Medical College, Yonsei University, from Nov. 1959 to Dec. 1977 which was published in 1980, the anesthetic experiences of 12,608 cases performed from Jan. 1978 to Dec. 1982 were analyzed, according to age, sex, department, physical status, emergency Procedureornotn, anesthetic agent, complication, and in addition, the ratio of medical insurance patients after enforcement of medical insurance patients. The results are as follows; 1) The number of cases receiving anesthesia tended, to increase year by year and the rate of increasi was remarkable for female patients. 2) Sexual distribution was 6049 males(48.0%), and 6559 females(52.0%). 3) 44.4% of patients were in the 2nd to 4th. decade of life and the patients over 60 years had increased markedly, 4) Among the departments General Surgery accounted for 30.7%, aner Obstetric sand Gynecology for 30.0%. 5) General anesthesia was use in 76.2% and regional anesthesia 23.8%. 6) The main anesthetic agent was halothane(47.9%). 7) Emergency operations were 37.6%, of the total. 8) Medical insurancs patients have increasied remarkably year by year. 9) Cardiac arrest in the operating room and the recovery room consisted of 4 cases. (0.032%).