Preliminary data from 2005 indicate that stroke accounted for about 1 of every 17 deaths in the U.S. On average, every 40 seconds someone in the U.S. has a stroke.
Rosamond W, Flegal K, Furie K, Go A, et al. Heart Disease and Stroke Statistics- 2008 Update. Circulation. 2008; 117. http://circ.ahajournals.org/cgi/content/short/117/4/e25