I think its this in HandicapInfos. Each incidence is one chance to get that type of goody hut result. So, for Settler level, you get this:
<Goodies>
<GoodyType>GOODY_HIGH_GOLD</GoodyType>
<GoodyType>GOODY_HIGH_GOLD</GoodyType>
<GoodyType>GOODY_HIGH_GOLD</GoodyType>
<GoodyType>GOODY_HIGH_GOLD</GoodyType>
<GoodyType>GOODY_LOW_GOLD</GoodyType>
<GoodyType>GOODY_LOW_GOLD</GoodyType>
<GoodyType>GOODY_MAP</GoodyType>
<GoodyType>GOODY_SETTLER</GoodyType>
<GoodyType>GOODY_SETTLER</GoodyType>
<GoodyType>GOODY_WARRIOR</GoodyType>
<GoodyType>GOODY_WARRIOR</GoodyType>
<GoodyType>GOODY_SCOUT</GoodyType>
<GoodyType>GOODY_WORKER</GoodyType>
<GoodyType>GOODY_WORKER</GoodyType>
<GoodyType>GOODY_EXPERIENCE</GoodyType>
<GoodyType>GOODY_HEALING</GoodyType>
<GoodyType>GOODY_TECH</GoodyType>
<GoodyType>GOODY_TECH</GoodyType>
<GoodyType>GOODY_TECH</GoodyType>
<GoodyType>GOODY_TECH</GoodyType>
</Goodies>
4 chances for high gold, 2 for low gold, 4 for goody tech etc...
Higher levels get chances for lots of nasty barbarians and fewer techs and less gold. Hmm, I wonder if its possible to add goody types?