your making one huge assumption - that is the world gold councils figures are accurate!
the give away is not only for the table you provided but any statistic provided that goes to 1 or
more decimal places is , it is not possible to measure these type of things that accurately
there are always things hidden for example smuggling, governments not providing true
information either on purpose or through lax accounting practices etc.
yes that can work both ways, as in under and over reporting , so the use of an error of
margin of 5-10% would be wise
