optimization: 32%
stochastic-processes: 31.3%
numerical-methods: 30.3%
statistics: 29.8%
pde 27.7%
differential-geometry: 27%
probability-distributions: 26.8%
fourier-analysis: 26%
algebraic-topology: 25.5%
representation-theory: 25.3%
algebraic-geometry: 24.9%
algorithms: 23.3%
differential-equations: 22.1%
probability-theory: 21.6%
functional-analysis]: 20.8%