This chart may shed some (outdated) light on the topic:

http://www.kepplerspeakers.com/literature/Franzese%20M-Article%20(Fortune%20-%2050%20Biggest%20Mafia%20Bosses).pdf

Hey guys, I'm trying to post a link to the 'Fortune Wealthiest Mafia Bosses' list from 1988. However, I am not able to figure out how to do it except to copy and paste the address above. But it doesnt work when I plug it in to the search/address field. Anyway, it is a cool chart. If anyone wants to read/download it, tell me how to tranfer the link. Thanks.