In 2015–16, about 796 alcohol and other drug treatment services provided just over 206,600 treatment episodes to an estimated 134,000 clients. The top 4 drugs that led clients to seek treatment were alcohol (32% of treatment episodes), cannabis (23%), amphetamines (23%), and heroin (6%). The proportion of episodes where clients were receiving treatment for amphetamines has continued to rise over the 5 years to 2015–16, from 12% of treatment episodes in 2011–12 to 23% in 2015–16. The median age of clients in AOD treatment services is rising, from 31 in 2006–07 to 33 in 2015–16.