I don't have those figures with me. I can tell you, though, that in those countries a sentence of life imprisonment is life. So what we're really talking about is when they are released from custody, the average figure for a number of jurisdictions--and unfortunately I am unable to list them--is something like 15 years of custody. In Canada the figure that has been cited is 28.4 years of custody for murder, prior to being released.
On November 2nd, 2010. See this statement in context.