[2020] Approximate likelihood of pawn traits

These numbers are not correct; they're too low and inaccurate because they're ignoring a ton of stuff in backstories, and some other game systems that affect this as well. They're also expressed in a pie chart which doesn't make sense since pawns can have several traits at once.

There is a debug tool that runs a Monte Carlo analysis of this we used to help tune. But of course the actual prevalence is relative to each actual playthrough.