Based on the independent particle model, we consider single and multiple ionization of neon and argon atoms induced by fast proton impact. Multiple ionization at high projectile energies (EP ⪆ 1 MeV/amu) is dominated by Auger-like processes and can be described appropriately by our statistical model introduced recently. In the present work we use several scattering models to extract angular differential cross sections. With our results a long-standing discrepancy between different experimental data sets is resolved.