high blood pressure as we'll talk about so that the chance of a given individual to have a stroke is actually less now than it was a few years ago because of risk factor control but the population of course is getting older baby boomer boomers like myself are starting to head up into the stroke prone age groups so that means that even though we have a little bit better control of the risk factors the number of strokes that we anticipate over the next two decades is very high and that we're going to go well above the 780,000 strokes that