I served an LDS mission in Guatemala in the late 1980s. As my mission progressed, we began to average over 700 baptisms per month, with some companionships baptizing over 40 in one month. When I tried to talk with my mission president about the issue--it got messy. Today we claim 12+ million in the Church, but truth be told, less than 1/2 of them actually consider themselves Mormon....and thus the reason why activity rates are so closely guarded.