“The list of the top 200 collectors includes developer Aby Rosen, composer Andrew Lloyd Webber and brokerage executive Charles Schwab. Schwab was knocked out of the top 10. Although art-loving billionaires are sprouting up around the world, the U.S. hasn’t lost its dominance. Six of the top 10 collectors live primarily in the U.S. That’s true of 107 of the top 200 collectors.”