Hi David, I guess the problem arises from the fact that although there were 'x' amount of QSA's issued to each TG, the main point is that only a lesser number were accepted/claimed and a lot (in a number of cases) were returned. For Kokstad, there were 64 returns out of (I think) 155 issued QSA's. This would have quite an impact on the rarity of a particular TG?