Is that five billion individual owners? That's pretty impressive! Current estimates put the whole world population at just under 7 billion. http://www.census.g

Is that five billion individual owners? That's pretty impressive! Current estimates put the whole world population at just under 7 billion. http://www.census.gov/main/www/popclock.html http://www.census.gov/main/www/popclock.html has it at about 6.8B, and a Google search on "current world population" turns up similar figures.