[vacri]

> Homicide rates are the key number to track.

It's also basically the only thing you can compare between nations as well. About ten years ago I saw a New Zealand-based study that took crimes from NZ, Australia, and the US, and rated them using the other countries' parameters. I've sadly been unable to find this study again, but it was very interesting in its results - the way crime is reported, the same event in Australia and NZ will show up about five times more than in the US. If two blokes have a fight outside a bar and it involves weapons, in the US, usually just one charge will be brought. But in Aus/NZ, the way the law works, about five charges are brought, eg from simple assault to attempted murder, and only the most severe successful charge would be used for sentencing. However, when the stats are aggregated, it's done by charges brought, not convictions (for some odd reason).