How many Centurion cardholders are there in the world?

How many Centurion card did American Express issue?

United Kingdom: 18,500
Hong Kong: 13,500
Germany: 10,500
Australia: 6,000
Spain/Sweden/Italy/Netherlands: 4,500
Switzerland: 2,800
France: 1,500
Singapore: 1,300
Saudi Arabia: 1,000
Israel: 800
Middle East (other countries): 500
U.S. Not many

These numbers are from a press kit for the Centurion magazine ad sales in Asia and Europe according to:

http://creditcardforum.com/american-express/33-how-many-people-have-american-express-black-cards.html

Great answer. This is somewhat similar to the Visa Black Card, which is limited to the top 1% of the richest Americans, many of whom are expatriates in these countries.
http://credit-cards-pay.blogspot.com/2011/08/is-black-card-for-you_15.html
http://seigfried23.hubpages.com/hub/The-Barclay-Card-Visa-Black