Do you know where I can find some numbers on this? It's something I've always wondered. We're told by the media that 90% of heroin addicts are on the street stealing to maintain their habit - but I wouldn't be surprised if 90% of heroin addicts appear to have these "normal" lives.
Office for national statistics are nice. They're robust about what does or doesn't count, and how they count, and where you need to be cautious with the numbers. http://www.ons.gov.uk/
The other place might be Public Health Outcomes: http://www.phoutcomes.info/
EG http://fingertips.phe.org.uk/profile-group/mental-health
And finally NICE tend to have excellent referencing.
Noodle around here to find the NICE guidance. http://pathways.nice.org.uk/pathways/drug-misuse
This is a pretty ridiculous comparison
The only way I see this changing is when it financially makes sense. Taking Colorado as a model, the UK could get in the region of £400million a year in tax benefits from the legalisation of cannabis alone.
Drug related crime is estimated to cost the country £14 billion annually.