The central bank estimates Australians spend 13.7 billion dollars in the year through August 2017, with methamphetamine and cannabis accounting for over 70% of purchases.
Released Tuesday, a research paper exploring the usage of the nation’s banknotes, suggests almost 2% is used for illegal drug deals, with users still making face-to-face sales.
Excluding cannabis, methamphetamine is the most used illicit drug by weight, followed by cocaine, MDMA or ecstasy, then heroin.