Where does almost all RF current flow in a conductor?

When dealing with alternating current (AC) at radio frequencies (RF), almost all the current flows along the surface of the conductor rather than uniformly through its entire cross-section. This is due to the skin effect, which makes the center of the conductor practically unused for carrying high-frequency electrical current. Distractors suggesting the current flows in the center or inside the magnetic field itself are incorrect. While a magnetic field surrounds the conductor, the electrons themselves physically move within the conductive material, specifically constrained to its outer boundary.