The followingtable shows the total number of new clients treated each year and the percentagewho had at least one previous entry in the SDMD in the previous five years.Clients may occur more than oncein the database if(a) they enter treatment at anagency, leave, and re-enter treatment at least six months later, or(b) they are referred from oneagency to another.Consequently, the estimate of“clients previously treated” presented in the following...