 In 2013 Senholt noted that because the group has no official membership , it is " difficult , if not impossible , to estimate the number of ONA members " . Senholt suggested that a " rough estimate " of the " total number " of individuals involved with the ONA in some capacity from 1980 to 2009 was " a few thousand " ; he had come to this conclusion from an examination of the number of magazines and journals about the subject circulated and the number of members of online discussion groups devoted to the ONA . At the same time he thought that the number of " longtime adherents is much smaller . " Also in 2013 , Monette estimated that there were over two thousand ONA associates , broadly defined . He believed that the gender balance was roughly equal , although with regional variation and differences among particular nexions . 
