"Average" FT ship size?

Does anyone have any data on what an "average" ship costs in FT? I am
trying to set up some campaign rules, and it would be nice if an
"average" cost coulid be used to judge roughly how many ships a player
should be able to build (except the stomp'em gang, of course...)

Thanx

Edward Lipsett
Fukuoka, Japan
elipsett@intercomltd.com