When I read this in my newspaper this morning I had the same idea as you, Amos, namely to add it here.

As it is I just can add the main figure: 9,000,000,000 is the estimated maximum (at about 2070), that is roughly 50% more than today.

And I can add how 'exact' that prediction from Austria is: With a probability of 80% the real figure in 2100 will be between 5.6 and 12,1 billion. Not a very impressive accuracy.

Wolfgang