Associate Health Minister Peter Dunne said the drug harm index would help tailor policy, and he would present the results at the upcoming UN special session on drugs in New York in two weeks.
The Ministry of Health-commissioned drug index estimated that 388,000 Kiwis used illegal drugs - of which about 37 per cent were "polydrug" users, or those who used different illegal drugs. It was estimated that, in 2014, illicit drug use cost New Zealand $1.85 billion.
The total cost of personal harm to drug users was estimated at $601 million. Cannabinoids (both natural and synthetic) and amphetamine-type stimulants caused the most harm in total.
However, when looked at by individual, cannabinoids cause the least personal harm at $9900 each year per dependent user, compared to amphetamines at $184,200. The harm caused to communities (family and friends, organised crime and acquisitive crime) was put at $893 million, and the cost of enforcement and health interventions was $351 million.
Recent research undertaken for police suggests 56 per cent of the proceeds from drug trafficking is reinvested in criminal activity (mostly more drug trafficking, but also extortion, fraud, pornography and weapons trafficking), with the rest spent on lifestyle.
Police data indicates that drug revenue includes 83 per cent profit, with the remaining 17 per cent reimbursing the costs of running the business.
More than $70 million in funding for other criminal activity is provided by the sale of illegal drugs, with close to 90 per cent of that generated through the sale of cannabinoids.
"In general, the casual user does not face the range or intensity of harms endured by dependent users," the drug harm index report notes. "Nevertheless, the casual user makes a significant contribution to the expansion of criminal activity beyond drug trafficking and into other forms of crime."
More than $30 million from drug sales to casual users is then used to fund crime. Overall, $245 million is lost in taxes that would otherwise be paid on revenues and profits generated by illegal drug trafficking.
The figures
Estimated social cost of drug-related harms and intervention costs in 2014/15:
• Amphetamine-type stimulants: $364.2 million
• Cannabinoids: $1.282 billion
• Hallucinogenic and psychedelic: $22.3 million
• Opioid and sedative: $175.9 million
Source: Drug Harm Index 2016
See the report