Here are a couple of articles on our last recovery. As the news goes they got the rough idea out but aren't 100% accurate.
http://www.cdapress.com/articles/2006/04/25/news/news03.txt
http://www.cdapress.com/articles/2006/04/28/news/news02.txt
Gary D.
http://www.cdapress.com/articles/2006/04/25/news/news03.txt
http://www.cdapress.com/articles/2006/04/28/news/news02.txt
Gary D.