you have a list of the ones that have had greater treated prefb lens. when you do your time series, what have we had any reduction in, in term of treated prevalence? what's gone off the list. great savings in smallpox. is it an added key to the keyboard? >> that's a good question. we've probroken these into i gu we have 260 that we've looked at, and i'd say most of them are fairly constant. i mean, obviously big ones like heart disease and cancer are getting improvements in. the one that has been the biggest decline which actually adds to, you know, actually adds to a lot of the cost is trauma. the prevalence of trauma cases has gone done fairly substantially. that's a big redux. but most of these have seen, you know, fairly substantial increases over time. a lot as i mentioned have been owe decemberty related and a lottery lated to cardiovascular risk factors. i think kind of the interesting thing is, is that if you look the spending growth of the united states, going back to '40s for '50s, not that it's a whole lot difference. it's 2, 2.5 percentage p