Frequencies for first 10,000 rows of pct012e063 variable in sf12000860us20 dataset :

   60 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,904       99.04       99.04
          1 |         93        0.93       99.97
          2 |          2        0.02       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017