I wonder... with a lifetime gross that small for so many movies, once you take out production costs and distribution costs, how much is he really taking in on movies? I would guess it's not much, unless his movies are extremely low-budget. He can probably make more dough as a guest speaker in Ithaca.
I believe his films and books sell far more internationally than in the US. I think he sold something like 3 times as many books in Germany alone than he did in the USA. make no mistake about it, he's rolling in dough...