thanks for helping me on the other questions but i have 1 more...

what is the % of population affected with pneumonia. If you could answer this question than it will be very helpful. thank you :)

About 3 million people in the U.S. develop pneumonia each year. The current population is estimated to be 312,532,529. Divide 3 million by 313 million to find the approximate percentage.

http://www.medicinenet.com/pneumonia/article.htm#glance