About one in 200 people sought treatment for alcohol and other drug use in the 2015 financial year, according to the Australian Institute of Health and Welfare.

Alcohol was the most common drug of concern, accounting for 38% of treatments.

This is the case across most states and territories except Queensland, where cannabis (36%) leads, followed by alcohol (34%).

Although cannabis is the second-most common drug of concern nationwide, accounting for 24% of cases, its prevalence is not consistent across states and territories.

In NSW, WA, SA and the ACT, amphetamines were the second-most common drugs of concern.

The institute’s data shows about 115,000 people received more than 170,000 treatments during the year.

Amphetamine treatment doubled from 9% of cases to 20% between 2010/11 and 2014/15.

For people aged 30 and above, alcohol was the most common drug. For those aged 10-29 it was cannabis.

Over the past 10 years the percentage of younger people (20-29) being treated fell from 33% of cases to 27%, while those aged 40-plus increased from 26% to 32%.

About 87% of people with drug dependency were born in Australia. More than two-thirds were male and more than half were aged 20-39.