  Using high-accuracy rotation curves of spiral galaxies, we derive
distributions of the surface mass density. Comparing with the luminosity
profiles, we show that the dark mass in disk and bulge distributions follows
those of luminous (stellar) mass, while luminous mass in halos does not follow
dark mass. The dark-mass fraction (DMF) increases with the radius in the disk,
and rapidly toward edge in the halo. In some galaxies, DMF increases toward the
center,
