The sum of the Qs (Q1 + Q2) for the two Verhulst functions is 7574x10⁶ troy ounces. The amount extracted by 2005 was 4439x10⁶ troy ounces. The reserves plus the amount extracted is 5789x10⁶ troy ounces and the reserves base plus the amount extracted is 7333x10⁶ troy ounces. So the sum of the Qs is slightly more the reserves base plus the amount extracted.

It appears that the World gold extraction has peaked, but there may be more peaks in the future. Of course, eventually the uses of new gold in technology will have to diminish. Recycling of gold in technological devices will become more important than it now is regarded.