Ninety-five per cent of SAAP agencies participated in the collection in 1996-97, and consent to collect information was obtained from clients for 64% of occasions of support. The resulting incomplete coverage means that estimates based on support periods with consent understate considerably the volume of assistance provided by SAAP agencies and the number of people using the services. This report describes adjustment methods developed by the AIHW to overcome these problems. Adjusted estimates of occasions of support and the number of clients to which they relate are presented.