In the 1980s the Baháʼís of the United States started including “address unknown” in their membership statistics; members who may profess belief but are no longer participating in community life. For example, in its 2020 Annual Report the US National Spiritual Assembly had 177,647 registered Baháʼís of all ages, only 77,290 of which had good addresses, and 57,341 total participants in core activities, with 37% of attendees from outside of the Baháʼí population. The higher American number has been challenged because it does not include those who have left the community, but the lower number with good addresses does not include inactive Baháʼís who continue their belief. As author William Garlington noted,