dr. volkow is very smart, she is a researcher that had to be very careful when we term data. we have to be cautious. we have to use conservative language but she makes a point that these things are leading to transition to abuse. i come across a couple studies where the data suggests that people are using prescription drugs, therefore, it leads them to using heroin. then they typically over-d, overdose. now when i look at the numbers on this graph, it shows changes over time. in other words trends. but nowhere in this report that i came across did it make reference to these changes being significant and that is very important because in research when we talk about statistics when we find something that is significant that means that it is due to something other than chance. it is not a chance occurrence. often times we make attribution, has to do with independent variable or whatever it is we're looking at. at least when i look at this chart, this to me shows normal trends across time. there is no rhyme or reason for the changes of frequencies. now i have highlighted and prob