http://isitmeoriseveryoneelsestupid.com/2008/12/09/where-the-money-is-at/
165,000,000 registered TLD’s (100,000,000 GTLDs, 65,000,000 ccTLDs)
75% of all domains are renewed
110,000,000 domains are developed (67%)
37,000,000 domains are parked (22%)
18,000,000 domains have no DNS settings...