As a nitpick, it's not axiomatic that hungry and angry people commit more crimes. It could certainly be true, but it's not so self-evident that the claim requires no proof.

Also, what's the point of making a quantifiable estimation (your "90%") if you have no actual data behind it? Just say you believe something based on observation; throwing out a nice round percentage to describe your belief, even as a figure of speech, does a disservice to real attempts to quantify phenomenon in a discussion.