PM
There is other evidence for the growth rate in the frum community. There have been studies dome based on the growth rate in a number of Bais Yaakov schools as well as a sibling study (derinving the growth rate from the average numbers of children per family) Those have been done on a more stricly defined Yeshivish community and come up with a higher growth rate. due to the limitations of this forum there is not much I can show you so the Avi Chai is the one we work with