Ismene's logic is a little flawed though, you would not necessarily seen a "huge uptick" in the society-wide rates of schizophrenia... for that to occur a large % of the population would have to have also become psychedelic users in the timeframe, but according to http://www.serendipity.li/dmt/166607.html (just what I found on a quick search) the rate of high school seniors to have tried a "psychedelic drug" seems to be at a max of about 25%.
Good point Dwayne but perhaps with the number of people having schizophrenia in a population being so tiny anyway - 250,000 in the UK out of a population of 70 million, perhaps you wouldn't need too many people taking psychedelics/pot to notice a spike in the numbers.
