[Someone]

“Dyslexia has more than 3 million cases in the US every year.”

If interpreted as “3 million _new_ cases every year, and dyslexia being incurable, with a life expectancy of 70 years, that would mean way over half the population of the USA would be dyslexic.

I seriously doubt that. So, what do you mean by “every year”?

[bjo590]

I typed "dyslexia" into Google, and on the side bar overview it says "More than 3 million US cases per year"

Edit: I dug a little deeper. It's 5-15% of the population. http://www.ldonline.org/article/10784/