Bill, I don't know what to tell you -- the woman I spoke with at the NMSS told me that the statistics are from 1975. As per my thread about being upset with the statistics, that was the specific nature of my call.

This article supports that the last actual survey was in 1975 so is what you're saying that they increased the estimate in 2005? If that's the case, I'd like to know what it was before if you have it.

http://www.medicalnewstoday.com/articles/40510.php