http://www.nytimes.com/2009/04/21/health/21para.html
<p>New York Times, Published: April 20, 2009 <br /> It may be hard to fathom, but in the haystack of government health statistics that track cancer, car accidents, twin births to women over 40, fat teenagers and people who quit smoking, there has been no reliable estimate of the number of Americans affected by paralysis.</p>