Frequencies for first 10,000 rows of pct012e171 variable in sf12000860us20 dataset :

   64 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,906       99.06       99.06
          1 |         91        0.91       99.97
          2 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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