i'm joined by douglas mudd curator of knew miss numismatic association. and incrementally throughout most of our history? >> yes ray basically money tends to be conservative overall throughout history and american money especially because of its international role, is very conservative. and tends to remain so and has been for roughly 100 years right now. >> when is the last time we changed a bill this any significant way apart from expanding the size of the portraits of franklin and grant and hamilton, have we really made a big splashy redesign of american money any time recently recently? >> not recently. the last time we had a major change, actually affected all american paper money. and that was in 1928 when we went from the old horse blankets or large-size notes which were about 20 to 25% larger than the current notes to the smaller size we are familiar with today. >> nathaniel green have people risen and fallen in the estimation and appreciation of americans throughout our whole history? when we make up our mind about somebody like andrew jackson do