Frequencies for first 10,000 rows of pct012e181 variable in sf12010860us24 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,956       99.56       99.56
          1 |         40        0.40       99.96
          2 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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