In the U.S. from 2006 to 2010, there was a 59 percent increase in cannabis-related hospital emergency room visits and a 14 percent increase in cannabis-related treatment admissions, the report said.
It's reported that ~ 40% of Americans smoke pot
With decriminalization becoming the "norm" more people will freely admit that they smoke pot.
like anything else, the more people that do something the % is "higher" that they will be involved something elst to be used as a statistic.
Also read yahoo headline (missing link) - Obama giving FREE pot to the poor
Berkeley, California, is likely to begin forcing medical marijuana dispensaries to offer free marijuana to the homeless and other low-income people.