The murder rate has fallen to its lowest level in 20 years but police admit that the main reason may be the skills of paramedics and advances in medicine rather than a decline in violent attacks.
Murder is used as an indicative measure for overall crime. Because it\’s one of the very few that are completely definable. You\’ve got a body dead here by violent means. So we can use this as a proxy for other crime which can be more neulous in its definition.
However, if the number of attempted murders is static (and I don\’t know whether they are) but murder itself is falling as a result of better medical treatment then perhaps the fall in the headline rate of murder is not indicative of a fall in general levels of crime or of violent crime against the person.
A similar point is made about battlefield deaths. Military health care is so much better than it was that the ratios of dead to wounded have changed dramatically over the past few decades.