1 in 150 is consistent with what Wikipedia said (6 in 1000). As we all know, Wikipedia KNOWS EVERYTHING and is NEVER WRONG. cough As other people have commen

1 in 150 is consistent with what Wikipedia said (6 in 1000). As we all know, Wikipedia KNOWS EVERYTHING and is NEVER WRONG. cough As other people have commented, it's also unclear to what extent this represents increased diagnosis or actually increased levels of the condition; to the extent that it is the former, it's not clear what amount of driving-reduction that translates to. Finally, it's worth noting that there's a 20+ year lag between the conception of a kid who will have an autistic spectrum disorder someday and the day when he or she will be in the twenty-somethings statistical bucket; I'm not sure how that maps onto proposed increases in the incidence of autistic spectrum disorders but we are talking about cohort-1996 and earlier so insofar as there has been an increase in the past few years it's not relevant yet. And even if it is 5%, and even if that is a lot given that it's a single disorder, what of the rest of the statistic that's 19 times as big? I'll just go out on a limb and guess that at least half of the change is primarily related to economic circumstance and not incidence of some disease or disorder.