http://healthland.time.com/2011/08/04/under-the-knife-study-...

"People have always been afraid of general anesthesia. Many fear they won’t wake up from this “artificial sleep” — actually more of a coma, albeit drug-induced and reversible. In the 1940s, for every one million patients operated on under full anesthesia, 640 died. By the end of the 1980s, fatalities were down to four per every million, thanks to modern safety standards and better medical training. However, a recent article published in the Deutsches Ärzteblatt, the German Medical Association’s official international science journal, shows that after decades of decline, the worldwide death rate during full anesthesia is back on the rise, to about seven patients in every million. And the number of deaths within a year after a general anesthesia is frighteningly high: one in 20. In the over-65 age group, it’s one in 10."