Frequencies for first 10,000 rows of pct012e174 variable in sf12010860us24 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,920       99.20       99.20
          1 |         78        0.78       99.98
          2 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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