I found this info on it, – Piggington's Econo-Almanac

February 19, 2008 at 3:09 PM #156009

Participant

I found this info on it, somewhat: http://www.sddt.com/Commentary/article.cfm?Commentary_ID=20&SourceCode=20031024tdf

I don’t know if you have to be low income to buy it.