Cooling age and total age (=τ_cool + τ_prog) distributions for the white dwarf samples (top panels) and the white dwarfs in common proper motion pairs (bottom panels). The total ages are shown for both our adopted IFMRs. The histogram bars and the error bars account for a standard 2/8 ratio of non-DA/DA spectral types and for the age uncertainties, as they are listed in Tables 5 and 6.