Here is another chart which is based on households. The data is not as up-to-date but shows essentially the same thing. The NZ proportion is high compared to many other European countries;

The welfare state is unsustainable economically, socially and morally.
To strengthen the work-first principle and increase the labour supply, the Government proposes a third step in the in-work tax credit and a reduction in total state income tax. The proposals have an overall scope of SEK 15 billion. The three steps combined mean that approximately 97 per cent of all people in full-time work will have received tax reductions of more than SEK 1 000 a month.
The Government also presents a tax package for businesses that will lower their taxes by nearly SEK 16 billion in 2009. The aim is to strengthen incentives for companies to invest and take on new employees. The corporate tax rate will be reduced from 28 to just over 26 per cent and employers' social security contributions will be reduced by one percentage point. In addition, the administrative burden on businesses will be eased by a number of simplifications, as a step towards the Government's target of reducing the administrative burden on businesses by 25 per cent by 2010.
A decade or so ago, it could be argued that the evidence was not yet in on drugs. No one has ever believed illegal drug use could be eliminated, but there was a defensible view that prohibition could prevent more harm than it caused. Drug use is not a private act without consequences for others; even when legal, it incurs medical and other costs to society. A society that adopted an attitude of laissez-faire towards the drug habits of its citizens could find itself with higher numbers of users. There could be a risk of social abandonment, with those in poor communities being left to their fates.
These dangers have not disappeared, but the fact is that the costs of drug prohibition now far outweigh any possible benefits the policy may bring. It is time for a radical shift in policy. Full-scale legalisation, with the state intervening chiefly to regulate quality and provide education on the risks of drug use and care for those who have problems with the drugs they use, should now shape the agenda of drug law reform.