Primarily for curiosity:- the Mountain Training website says that they qualify over 2,000 leaders/instructors every year (presumably meaning passes at assessment of one of their qualifications), without giving a breakdown. Also, I know that the ML award was established over 50 years ago, but some of the other MT quals have been established much more recently. However, is there any data on how many holders of each qual there are?
As the quals don't expire, the total number awarded (particularly for SML) may be significantly more than the number of individuals who are currently active, but it would be interesting to know the very rough numbers of MLs, WMLs, MCIs etc. While I don't think it's compulsory to use DLOG, I guess that the number of active DLOG accounts might give a better idea of numbers?