Frequencies for first 10,000 rows of pct012e081 variable in sf12010860us24 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,975       99.75       99.75
          1 |         23        0.23       99.98
          2 |          1        0.01       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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