would like to see a similar chart containing the social class of the protagonist

http://io9.com/5911520/a-chart-that-reveals-how-science-fiction-futures-changed-over-timeI would like to see a similar chart containing the social class of the protagonists (Futurama:lower, Gibson: lower middle, Star Trek: Middle, Asimov: upper middle, Herbert’s Dune: Upper.) Because I think that would tell us just as much about class changes as it does about the presence of technological change.