You may want to check this table of drug abuse statistics worldwide. It indicates drug abuse in North America (as percentage of the population) for opiates is twice as high as the netherlands.
In the US, substance abuse as a percentage of the population is 0.6%. In the Netherlands, it is 0.3%. The united kingdom is 0.9%. Hence, The Netherlands has the lowest of the three.
For cocaine, the US abuse statistic, is 2nd only to spain at 2.8%. The uk is 2.4% and the Netherlands is 1.1% (again, much lower).
The US is also consistently higher for other serious drugs than the Netherlands and more often than not, higher than the UK also:
http://www.unodc.org/pdf/research/wd...prevalence.pdf