There are people in jail for drug selling and production, but very few for casual use.
The U.S. is the same way: http://www.usdoj.gov/dea/demand/speakout/10so.htm
"The Michigan Department of Corrections just finished a study of their inmate population. They discovered that out of 47,000 inmates, only 15 people were incarcerated on first-time drug possession charges."
No, it's not the same. Even a cursory look at the issue shows that much of the US prison population is due to "3 strikes" laws. By looking only at first time possession charges, that entire group is missed.
Furthermore, police in the US have the power to seize cars, seize money, and quite number of other things without warrant, based upon the suspicion of drugs being involved. They can't do that here.
The U.S. is the same way: http://www.usdoj.gov/dea/demand/speakout/10so.htm "The Michigan Department of Corrections just finished a study of their inmate population. They discovered that out of 47,000 inmates, only 15 people were incarcerated on first-time drug possession charges."