This is some research I've done on the 30 "other lands" figures from the WT year book. Thanks to Cedars and his 30 Other Lands post. I've based in on that.
The population data was gatherered from Wikipedia. The publisher figures were taken from the 2012 year book. I also added in figures from 4 other large countries to show just how much preaching is being done by the WT.
This data puts WT preaching into perspective. It practically ensures that less than 50% of the world's population alive today has never been preached to. Although, you'll never hear that at the meeting.