The sum of the Qs (Q1 + Q2) for the two Verhulst functions is 95,105x10⁶ troy ounces. The amount extracted by 2005 was 34,524x10⁶ troy ounces. The reserves plus the amount extracted is 43,205x10⁶ troy ounces and the reserves base plus the amount extracted is 52,850x10⁶ troy ounces. So the sum of the Qs is more than twice the reserves plus the amount extracted and less than twice the reserves base plus the amount extracted. That is, there is probably a much larger amount of silver yet to be discovered in the World.

Probably about the year 2030 World silver extraction will peak and the uses of new silver in technology will have to diminish. Recycling of silver in technological devices will become more important than it now is regarded.