What are we to conclude from this hierarchy? Apparently, academia is working hard on Rawls, Quine, Kant and Rorty. Foucault is surprisingly up there. The Continental three of Nietzsche, Hegel and Heidegger are next, while Derrida, Wittgenstein and Deleuze are hanging in there. Lagging behind are Husserl, Lacan, Gadamer and Zizek.
Go to Google Scholar and enter your favorite philosopher to see how he or she ranks comparatively since 2009.