Frequencies for first 10,000 rows of pct012e173 variable in sf12010860us24 dataset :

   66 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,918       99.18       99.18
          1 |         78        0.78       99.96
          2 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017