In 2014–15, around 850 alcohol and other drug treatment services provided just over 170,000 treatment episodes to around 115,000 clients. The top 4 drugs that led clients to seek treatment were alcohol (38% of treatment episodes), cannabis (24%), amphetamines (20%) and heroin (6%). The proportion of episodes where clients were receiving treatment for amphetamines has continued to increase over the last 10 years, from 11% of treatment episodes in 2005–06 to 20% in 2014–15. The median age of clients in AOD treatment services is increasing, 33 years in 2014–15, up from 31 in 2005–06.