Looking at Wikipedia, which is an interesting site, I found that as of late 2006, the world population reached 6.5 billion. Today, the 12th of January, 2007, the number goes to 6.680 billion.

It is difficult to know the amount of gangsters in the world. Unfortunately they are everywhere. You can find interesting information in the next web site:

http://lang.presstelegram.com/socal/gangs/articles/ALL_p2main.asp

Just to give you an idea, in Los Angeles County, authorities identified 12,000 gangsters in 1973. Today, there are about 57,000 - a nearly 400 percent increase.